; and (II) not grant a request for a warrant that would put public safety at risk or unreasonably inconvenience the community. (iv) Period of initial authorization No warrant described in clause (i) may authorize the use of a cell site simulator for any period longer than is necessary to achieve the objective of the authorization, nor in any event for longer than 30 days. (v) Extensions (I) In general A court may grant extensions of a warrant described in clause (i), but only upon application for an extension made in accordance with clause (i) and the court considering the factors described in clause (iii) and determining the requirements under clause (ii) are met. (II) Period of extension The period of an extension of a warrant shall be no longer than the authorizing judge determines necessary to achieve the purposes for which the extension was granted, nor in any event for longer than 30 days. (vi) Termination provision Each warrant described in clause (i), and each extension thereof, shall contain a provision that the authorization to use the cell site simulator shall be executed as soon as practicable and shall terminate upon attainment of the authorized objective, or in any event in 30 days. (vii) Start of 30-day periods The 30-day periods described in clauses (iv), (v)(II), and (vi) shall begin on the earlier of— (I) the date on which a law enforcement agency first begins to use the cell site simulator as authorized by the warrant, or extension thereof