The Civil Rights Act of 1964 (Pub.L. 88–352; 78 Stat. 241) was signed into law on July 2, 1964. Several legislative histories of the Civil Rights Act of 1964 have been compiled, including:
For state statutes, you can begin with a 50 state survey, such as those available on Lexis or Westlaw. HeinOnline's Subject Compilation of State Laws also includes compilations of civil rights statutes from various sources.
There are several federal agencies that regulate the various aspects of civil rights law, including the Equal Employment Opportunity Commission (EEOC), all of which publish their rules and regulations in the Federal Register and Code of Federal Regulations(CFR).
For information on researching U.S. regulations generally, see the D'Angelo Law Library's Administrative Law Research Guide: