Each magazine is printed web offset: perfect bound. Keep live matter .25” from trim: head, foot, and sides. Because it is unknown at the time of production if the ad is to run on left hand page or right be sure to add .125” bleed on all sides.
Spreads that have crossover type should allow at least .25” safety from gutter on both pages of the spread. Any images that crossover should be double burned .0312” on each side to ensure correct alignment.