Antitrust and Trade Regulation laws aim to promote free competition in the marketplace. Agreements or cooperative efforts by two or more entities that affects or restrains competitors is illegal under these laws. The Sherman Act makes illegal any contract, combination, or conspiracy in restraint of trade or commerce and makes monopolies and attempts, combinations, or conspiracies to monopolize illegal. The Clayton Act regulate price discrimination, tying and exclusive dealing contracts, stock acquisition and interlocking directorates.
Signal Hill is a small city (2.2 mi², 5.8 km²) in Los Angeles County, California that is an enclave (completely surrounded by the city of Long Beach). As of 2005, the city population was 10,951. The city was incorporated on April 22, 1924, roughly three years after oil was discovered on Signal Hill. The city once shared three different postal ZIP codes with Long Beach, but in July 2002, the City of Signal Hill received its own ZIP code, 90755. It is in the 562 area code.