New York Consolidated Laws, Criminal Procedure Law - CPL § 705.35 Assistance in installation and use of a pen register or a trap and trace device

1. Upon the request of an applicant authorized to use a pen register under this article, a provider of a wire or electronic communication service, landlord, custodian, or other person shall furnish such applicant, or his agent, forthwith all information, facilities and technical assistance necessary to accomplish the installation of the pen register unobtrusively and with a minimum of interference with the services that the person so ordered by the court accords the party with respect to whom the installation and use is to take place, if such assistance is directed by a court order as provided in section 705.10   1 of this article.

2. Upon the request of an applicant authorized to receive the results of a trap and trace device under this article, a provider of a wire or electronic communication service, landlord, custodian, or other person shall install such device forthwith on the appropriate line and shall furnish such applicant forthwith all information, facilities and technical assistance including installation and operation of the device unobtrusively and with a minimum of interference with the services that the person so ordered by the court accords the party with respect to whom the installation and use is to take place, if such installation and assistance is directed by the court order as provided in section 705.10   1 of this article.  Unless otherwise ordered by the court, the results of the trap and trace device shall be furnished to the applicant, or his agent, at reasonable intervals during regular business hours for the duration of the order.

3. A provider of a wire or electronic communication service, landlord, custodian, or other person who furnishes facilities or technical assistance pursuant to this section shall be reasonably compensated for such reasonable expenses incurred in providing such facilities and assistance.

4. No cause of action shall lie in any court against any provider of a wire or electronic communication service, its officers, employees, agents or other specified persons for providing information, facilities or assistance in accordance with the terms of a court order under this article.  A good faith reliance by a provider of a wire or electronic communication service upon the validity of a court order issued pursuant to this article is a complete defense against any civil cause of action or criminal action based entirely on a failure to comply with this article.