; (ii) removal of transmission equipment; (iii) replacement of transmission equipment; or (iv) placement, construction, or modification of equipment that— (I) improves the resiliency of the wireless tower, base station, or eligible support structure; and (II) provides a direct benefit to public safety, such as— (aa) providing backup power for the wireless tower, base station, or eligible support structure; (bb) hardening the wireless tower, base station, or eligible support structure; or (cc) providing more reliable connection capability using the wireless tower, base station, or eligible support structure. (B) Eligible support infrastructure The term eligible support infrastructure means infrastructure that supports or houses a telecommunications service facility at the time when an eligible telecommunications facilities request for a modification of such facility is submitted to a State or local government or instrumentality thereof. (C) Eligible support structure The term eligible support structure means a structure that, at the time when an eligible facilities request for a modification of such structure is submitted to a State or local government or instrumentality thereof, supports or could support transmission equipment. (D) Eligible telecommunications facilities request The term eligible telecommunications facilities request means any request for a modification of an existing telecommunications service facility in or on eligible support infrastructure that does not substantially change the physical dimensions of such facility and that involves— (i) collocation of new telecommunications service facility equipment; (ii) removal of telecommunications service facility equipment; or (iii) replacement of telecommunications service facility equipment. (E) Telecommunications service facility The term telecommunications service facility — (i) means a facility that is designed or used to provide or facilitate the provision of any interstate or intrastate telecommunications service