61 Pa. Code § 2.1a
The following words and terms, when used in this chapter, have the following meanings, unless the context clearly indicates otherwise:
Closely-related person—The term includes the following:
(viii) A son-in-law, daughter-in-law, father-in-law, mother-in-law, brother-in-law or sister-in-law.
EIP—The Employment Incentive Payment credit program.
The provisions of this § 2.1a issued under section 506 of The Administrative Code of 1929 (71 P. S. § 186); section 491(e) of the Public Welfare Code (62 P. S. § 491(e)); and section 1701-A(e) of the Tax Reform Code of 1971 (72 P. S. § 8701-A(e)).
The provisions of this § 2.1a adopted October 28, 1988, effective October 29, 1988, 18 Pa.B. 4866.