Federal Register citations are found at the end of the CFR section text.
Proposed regulations dealing with environmental issues and comments on those regulations,
can be found on the Environmental Protection Agency's website.
If you already have a citation, you can use any of the regulation sources and even google: Dep’t of the Interior, Bureau of Land Mgmt., Oil and Gas; Hydraulic Fracturing on Federal and Indian Lands: Final Rule, 80 Fed. Reg. 16128–222 (Mar. 26, 2015).
Online source for U.S. government regulations from nearly
300 federal agencies. Examples of what you can do on this site:
*Search for a regulation such as a proposed rule, final rule or Federal Register (FR) notice"
You might also try the Advanced Search where you can limit by date / agency
oil gas hydraulic fracturing federal lands