Pennsylvania Consolidated Statutes - Crimes and Offenses (Title 18) - Part II. Definition of Specific Offences.
Chapter 31- Sexual Offenses

Section 3105. Prompt complaint

Prompt reporting to public authority is not required in a prosecution under this chapter: Provided, however, That nothing in this section shall be construed to prohibit a defendant from introducing evidence of the complainant's failure to promptly report the crime if such evidence would be admissible pursuant to the rules of evidence.