Yes, it is required for those types of signal enhancing systems. However, Passive DAS consumer signal boosters do not require explicit approval from carriers, they boost reception for all carrier networks simultaneously, they cost less to install, and can be installed much more quickly. However, if there's no signal available to amplify, then passive DAS will not work - You will have to go with Active DAS, Fem-to-cell, Pico-cell System. More....