(a) The following sections take effect August 3, 1987:

1. (1) The obligation to prepare MSDSs under section 4(b) of the act (35 P. S. § 7304(b)) and Chapter 307 (relating to Material Safety Data Sheet (MSDS)).
2. (2) The obligation of an employer to furnish, upon the request of an employe or employe representative, an MSDS for a hazardous substance or hazardous mixture present in the employer’s workplaces under section 5(c)(2) of the act (35 P. S. § 7305(c)(2)) and Chapter 307.
3. (3) The obligation of an employer to furnish, upon the written request of an employe or employe representative, a copy of the requested MSDS under section 5(d) of the act (35 P. S. § 7305(d)) and Chapter 307.
4. (4) The obligation of an employer to ensure that a container, including pipelines containing a hazardous substance or hazardous mixture, is labeled, tagged or marked under section 6(a)(1) and (2) of the act (35 P. S. § 7306(a)(1) and (2)) and § 309.2(a)(1) and (2) (relating to information required on label).

(b) The following sections take effect August 2, 1988:

1. (1) The obligation of an employer to ensure that a container, including pipelines, containing a single chemical is labeled, tagged or marked under section 6(a)(3) of the act (35 P. S. § 7306(a)(3)) and § 309.2(a)(3).
2. (2) The obligation of an employer to ensure that a container, including pipelines, containing a mixture is labeled, tagged or marked under section 6(a)(4) of the act and (35 P. S. § 7306(a)(4)) and § 309.2(a)(4).