A school will have satisfactorily complied with the requirements of the law if by two weeks after the opening of the school year the school administrator provides the local health officer with a statement certifying (a) the number of persons employed, (b) the number of volunteers, and (c) that the required certificate for each, signed by a physician licensed to practice medicine in California, or a notice from a public health agency or unit of the Tuberculosis and Health Association indicating freedom from active tuberculosis is on file and available for verification. Thereafter, the legal requirements will be met by obtaining the certificate prior to or within two weeks of date of employment, or acceptance of a volunteer, and repeating every two years.