in excess of 10 percent of the limits specified in the table in paragraph (a) of Section 20.101.

"(b) No licensee shall possess, use or transfer licensed material in such a manner as to cause any individual under 18 years of age within a restricted area to inhale, ingest or absorb airborne radioactive material possessed by the licensee in an average concentration in excess of the limits specified in Appendix "B", Table II of this part; or to ingest or absorb radioactive material possessed by the licensee in an average concentration in water in excess of the limits specified in Appendix “B”, Table II of this part. For purposes of this paragraph, concentrations may be averaged over periods not greater than a week.

"§ 20.105 Permissible levels of radiation in unrestricted areas. (a) There may be included in any application for a license or for amendment of a license proposed limits upon levels of radiation in unrestricted areas resulting from the applicant's possession or use of radioactive material and other sources of radiation. Such applications should include information as to anticipated average radiation levels and anticipated occupancy times for each unrestricted area involved. The Commission will approve the proposed limits if the applicant demonstrates that the proposed limits are not likely to cause any individual to receive a dose in any period of one calendar quarter (as defined in Section 20.101) in excess of 10 percent of the limits specified in the table in paragraph (a) of Section 20.101.

"(b) Except as authorized by the Commission pursuant to paragraph (a) of this section, no licensee shall possess, use or transfer licensed material in such a manner as to create in any unrestricted area from radioactive material and other sources of radiation in his possession:

"(1) Radiation levels which, if an individual were continuously present in the area, could result in his receiving a dose in excess of two millirems in any one hour, or

"(2) Radiation levels which, if an individual were continuously present in the area, could result in his receiving a dose in excess of 100 millirems in any seven consecutive days.

areas.

"§ 20.106 Concentrations in effluents to unrestricted (a) There may be included in any application for a license or for amendment of a license proposed limits upon concentrations of licensed and other radioactive material released into air or water in unrestricted areas as a result of the applicant's proposed activities. Such applications should include information as to anticipated average concentrations and anticipated occupancy times for each unrestricted area involved. The Commission will approve the proposed limits if the applicant demonstrates that it is not likely that any individual will be exposed to concentrations

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in excess of the limits specified in Appendix "B", Table II, of this part. For purposes of this paragraph concentrations may be averaged over periods not greater than one year.

"(b) Except as authorized by the Commission pursuant to Section 20.302 or paragraph (a) of this section, no licensee shall possess, use or transfer licensed material in such a manner as to release into air or water in any unrestricted area any concentration of radioactive material in excess of the limits specified in Appendix "B", Table II of this part. For purposes of this paragraph, concentrations may be averaged over periods not greater than one year.

"(c) For purposes of this section, determinations as to the concentration of radioactive material shall be made with respect to the point where such material leaves the restricted area. Where the radioactive material leaves the restricted area in a stack, tube, pipe, or similar conduit, the determination may be made with respect to the point where the material leaves such conduit.

"(d) The provisions of this section do not apply to disposal of radioactive material into sanitary sewerage systems (see Section 20.303).

"§ 20.107 Medical diagnosis, therapy and research. Nothing in the regulations in this part shall be interpreted as limiting the intentional exposure of patients to radiation for the purpose of medical diagnosis or medical therapy.

"§ 20.108 Orders requiring furnishing of bio-assay services; reduced exposure limits. (a) In any case where it appears that an individual in a restricted area may have received a dose or may have been exposed to concentrations of radioactive material in excess of the permissible limits established in Sections 20.101 to 20.106, inclusive, or may have accumulated a body burden of any radioactive material in excess of fifty percent of the quantity specified in Appendix "B", Table III, from licensed and other radioactive material in the licensee's possession, the Commission may issue appropriate orders directing the licensee to make available to the individual appropriate bio-assay services and to furnish a copy of the reports of such services to the Commission.

"(b) The Commission may issue appropriate orders to any licensee directing the licensee to reduce further exposure of any individual in a restricted area below the limits otherwise permitted under this part or prohibiting the licensee from permitting further exposure of any individual in a restricted area to radiation or concentrations of radioactive material, upon finding (1) that such action is necessary or desirable to protect health or minimize danger to life or (2) that the individual has accumulated a total body burden of any radioactive material exceeding the quantity specified in Appendix "B", Table III.

5. Subparagraph (a) of Section 20.202 is amended to read as follows:

"(a) Each licensee shall supply appropriate personnel monitoring equipment to, and shall require the use of such equipment by:

(1) Each individual who enters a restricted area under such circumstances that he receives, or is likely to receive, a dose in excess of 50 millirem in any period of 7 consecutive days;

(2) Each individual under 18 years of age who enters a radiation area; and

(3) Each individual who enters a high radiation area."

6. Subparagraph (b)(2) of Section 20.202 is amended by substituting "100 millirem" for "150 millirem".

7. "Column 2" is changed to "Column 1" in paragraphs (b) and (c) of Section 20.303.

8. Paragraph (a) of Section 20.401 is amended to read as follows:

"(a) Each licensee shall maintain records showing the radiation exposures of all individuals for whom personnel monitoring is required under Section 20.202 of the regulations in this part. Such records shall be kept on AEC Forms 20-2, 20-3, or 20-4, whichever may be applicable, in accordance with the instructions contained in those forms, or on forms substantially similar to and containing all the information required by those forms. The doses entered on the forms shall be for periods of time not exceeding one month."

9. The following new paragraph is added to Section 20.401.

(d) Records of individual radiation exposure which must be maintained pursuant to the provisions of this subsection shall be preserved until December 31, 1964 or until a date five years after termination of the individual's employment, whichever is later. Records which must be maintained pursuant to this part may be maintained in the form of microfilms.

10. Paragraph (b) of Section 20.401 is deleted. 11. Paragraph (c) of Section 20.401 is renumbered as (b) of that section.

12. The following paragraph is added to Section 20.403:

"(d) Reports to affected individuals. In any case where a licensee is required pursuant to the provisions of this section to report to the Commission any exposure or possible exposure of an individual to

radiation or to radioactive material, the licensee shall also notify such individual of the nature and extent of the exposure or possible exposure; and the period of time involved. Such notice shall be in writing and shall contain the following statement in conspicuous letters;

""This notice to you is required by the Atomic Energy Commission regulations entitled, "Standards for Protection Against Radiation" (10 CFR Part 20). You should preserve this notice with your important papers'.

The notice shall be delivered to the individual personally and receipt obtained or shall be delivered by certified mail or registered mail."

13. The following new section is added:

"§ 20.404 Notice to individuals of exposure to radiation. Each licensee shall periodically notify each individual for whom personnel monitoring is required by Section 20.202 of this part as to the individual's accumulated dose as indicated by the personnel monitoring procedures and records maintained by the licensee pursuant to Section 20.102. Such notice shall: (a) be in writing and contain the following statement:

"This notice to you is required by the Atomic Energy Commission regulations entitled "Standards for Protection Against Radiation" (10 CFR, Part 20). You should preserve this notice with your important papers.'

(b) be furnished to the individual at least annually and within 90 days after the end of the period of time covered by the notice or within 90 days after the termination of employment;

(c) cover all complete calendar quarters since the last previous notice furnished to the individual pursuant to this section. If no previous notification has been furnished to the individual pursuant to this section, the notice shall cover all periods of exposure after January 1, 1960;

(d) be delivered to the individual personally and receipt obtained or be delivered by certified or registered mail."

Information is not required to be included in the notice with respect to any calendar quarter in which the individual's dose is less than 125 millirem. Each licensee shall maintain in his files copies of all notices furnished to individuals pursuant to this section. 14. Appendix "A" is deleted.

15. Appendix "B" is amended to read as follows: