The policy must clearly disclose the intent of the insurer as to the applicability or nonapplicability of coverage relating to preexisting conditions. If coverage of the policy is not to be applicable to preexisting conditions, the policy shall specify, in substance, that coverage pertains solely to accidental bodily injuries resulting from accidents occurring after the effective date of coverage, and that sickness is limited to that which is diagnosed or treated subsequent to the effective date of coverage or expiration of the probationary period, if any.
31 Pa. Code § 88.51