1. Short title This Act may be cited as the Cooperate with Law Enforcement Agencies and Watch Act of 2019 . 2. Safe harbor with respect to keep open letters (a) In general (1) Amendment to title 31 Subchapter II of chapter 53 of title 31, United States Code, is amended by adding at the end the following: 5333. Safe harbor with respect to keep open letters (a) In general With respect to a customer account or customer transaction of a financial institution, if a Federal, State, Tribal, or local law enforcement agency requests, in writing, the financial institution to keep that account or transaction open— (1) the financial institution shall not be liable under this subchapter for maintaining that account or transaction consistent with the parameters of the request; and (2) no Federal or State department or agency may take any adverse supervisory action under this subchapter with respect to the financial institution for maintaining that account or transaction consistent with the parameters of the request. (b) Rule of construction Nothing in this section may be construed— (1) from preventing a Federal or State department or agency from verifying the validity of a written request described in subsection (a) with the Federal, State, Tribal, or local law enforcement agency making that written request