This new obligation to produce an age document in order to gain admission to bars is intended to assist licensees in complying with provisions relating to under age consumption of alcohol and to assist gardaí in enforcing the law. The current voluntary system has always had the minor problem attached to it that one publican may think another publican will be more lax in his or her enforcement if he or she introduces a policy requiring its introduction, the consequence of which is that the lowest common denominator of enforcement tends to apply because of commercial pressures.