apply, impose, implement, inforce, force, execute, enact, put into effect, enure, empose, more...

relax, repeal, negate, abandon, disregard

police, military, private security, self-enforce, self-defense, self-protection, self-help, self-defence, more...

crack down on,   implement law,   maintain law,   put in force,   compel obedience to,   crack dwon,   make strict,   secure justice,   to apply the law,   excersie the law