* Occupational Safety and Health Act is passed.
* 1970-73: OSHA exempts agricultural employers from "general industry" standards that require employers to provide adequate sanitation facilities for their workers.
* 1972: OSHA rejects farm workers' petition seeking a field sanitation standard.ST* 1973: Farm workers sue OSHA and labor secretary.
* U.S. District Court for the District of Columbia orders OSHA to develop a standard. OSHA appeals.
* 1976 OSHA publishes a proposed standard and accepts comments, most of them opposed. OSHA withdraws proposal.
* 1977: The U.S. Circuit Court of Appeals for the District of Columbia reverses the district court and remands the case back to the district court.
* 1978: OSHA says no action will be taken on the standard for 18 months. District court orders OSHA to complete the standard "as soon as possible." OSHA appeals.
* 1979: Circuit court reverses the decision again and remands the case to the lower court.
* 1980: OSHA tells district court it will need 45 more months to complete the regulation.
* 1981: OSHA tells district court it will need 34 to 39 more months to issue a regulation. Court finds the timetable unacceptable.
* 1982: OSHA and farm workers reach an agreement in which OSHA says it will immediately begin developing a standard and complete it -- or state why the agency can't -- by February 1985.
* 1984: OSHA publishes a proposed standard six weeks after the interim target date.
* January 1985: District court grants OSHA's request to extend the deadline for a decision on the regulation to April 16.
* March 1985: Labor secretary wins motion to transfer case to the appeals court. A week later appeals court warns OSHA it will regard with "extreme displeasure" any variance from OSHA's requested deadline of April 16.