The length of the field is not 'regulation'. = The field is not 'regulation' size.
Each agency has its own set of 'rules and regulations'.
the 'regulation of' gun sales by the government
(..) and victory for the French team. ... was Xania, the international pop star. They had been having quite a stormy affair. By the end of regulation time the score was tied... ... and the game went into sudden death. For a patriotic Frenchman and a true fan like myself... (..)2006 The Pink Panther