A client may not be left unattended during the heating or processing period of a permanent wave operation or chemical application.
49 Pa. Code § 7.100
The provisions of this §7.100 amended under sections 5 and 11 of the act of May 3, 1933 (P. L. 242, No. 86) (63 P. S. §§ 511 and 517).
This section cited in 49 Pa. Code § 7.90 (relating to applicability of requirements); and 49 Pa. Code § 7.125 (relating to health and safety in school).