Definition of "Regulation" :
noun: the act of controlling or directing according to rule
"Fiscal regulations are in the hands of politicians."
noun: the act of bringing to uniformity; making regular
noun: a principle or condition that customarily governs behavior
"Short haircuts were the regulation."
noun: an authoritative rule
noun: (embryology) the ability of an early embryo to continue normal development after its structure has been somehow damaged or altered
noun: the state of being controlled or governed
adjective: prescribed by or according to regulation
"Regulation army equipment."