; or (2) in the case of a government or instrumentality that has not established specific procedures for the review and approval of such a request, to submit to the government or instrumentality the type of filing that is typically required to initiate a standard review for a similar facility or structure. (j) Definitions In this section: (1) Eligible support infrastructure The term eligible support infrastructure means infrastructure that supports or houses a telecommunications service facility (or that is designed for or capable of supporting or housing such a facility) at the time when a request to a State or local government or instrumentality thereof for authorization to place, construct, or modify a telecommunications service facility in or on the infrastructure is submitted by the requesting party to the government or instrumentality. (2) Telecommunications service facility The term telecommunications service facility — (A) means a facility that is designed or used to provide or facilitate the provision of any interstate or intrastate telecommunications service; and (B) includes a facility described in subparagraph (A) that is used to provide other services. . 103. Requests for modification of certain existing wireless and telecommunications service facilities (a) In general Section 6409 of the Middle Class Tax Relief and Job Creation Act of 2012 ( 47 U.S.C. 1455 ) is amended— (1) in the heading, by striking Wireless and inserting Communications ; and (2) in subsection (a)— (A) in paragraph (1), by striking a State or local government and all that follows and inserting the following: a State or local government or instrumentality thereof may not deny, and shall approve— (A) any eligible facilities request for a modification of an existing wireless tower, base station, or eligible support structure that does not substantially change the physical dimensions of such wireless tower, base station, or eligible support structure