Section 835.602 - Controlled areas(a) Each access point to a controlled area (as defined at § 835.2 ) shall be posted whenever radiological areas or radioactive material areas exist in the area. Individuals who enter only controlled areas without entering radiological areas or radioactive material areas are not expected to receive a total effective dose of more than 0.1 rem (0.001 sievert) in a year.(b) Signs used for this purpose may be selected by the contractor to avoid conflict with local security requirements.58 FR 65485, Dec. 14, 1993, as amended at 63 FR 59684, Nov. 4, 1998; 72 FR 31926 , June 8, 2007