No employee who comes in direct personal contact with bathers or pool users will be permitted to enter duty without first undergoing a health examination, or remain in such employment without undergoing periodic health examinations, as required by the Superintendent, and being found free from any infectious or communicable disease.
36 C.F.R. §21.7
For a list of communicable diseases included in the regulations of the United States Public Health Service, see 21 CFR 1240.54 .