Entry to ENR2 after building hours and on the weekend is by CatCard only. 

The north and south main entrances on the first floor have CatCard PIN pad scanners. Hold your CatCard stripe down to the PIN pad and then enter your pin. The PIN pad light will turn green when the doors are open.

ENR2 occupants are automatically granted CatCard access. If you will need ENR2 after hours access for a special event please contact the head-office@math.arizona.edu