A child shall be exempt from immunization if: I. A physician licensed under RSA 329, or a physician exempted under RSA 329:21, III, an advanced practice registered nurse licensed under RSA 326-B, or a physician associate licensed under RSA 328-D certifies that immunization against a particular disease may be detrimental to the child's health. The exemption shall exist only for the length of time, in the opinion of the physician, advanced practice registered nurse, or physician associate, such immunization would be detrimental to the child. An exemption from immunization for one disease shall not affect other required immunizations. II. A parent or legal guardian objects to immunization because of religious beliefs. The parent or legal guardian shall sign a form stating that the child has not been immunized because of religious beliefs.