49 Pa. Code § 15.23
(a) An out-of-State landscape architect may obtain approval from the Board to practice landscape architecture in this Commonwealth for a period not exceeding 30 days in the aggregate in 1 calendar year by submitting proof that:
The provisions of this § 15.23 issued under sections 4 and 5 of the Landscape Architects’ Registration Law (63 P. S. § § 904 and 905); and section 810(a) of The Administrative Code of 1929 (71 P. S. § 279.1(a)).
The provisions of this § 15.23 adopted January 16, 1987, effective January 17, 1987, 17 Pa.B. 254; corrected February 27, 1987, 17 Pa.B. 887. Immediately preceding text appears at said page (113978).