[Sigaba]

FWIW, the memo is available here.

It does offer a disclaimer.

Disclaimer

As there is no right to the favorable exercise of discretion by the agency, nothing in this memorandum should be construed to prohibit the apprehension, detention, or removal of any alien unlawfully in the United States or to limit the legal authority of ICE or any of its personnel to enforce federal immigration law. Similarly, this memorandum, which may be modified, superseded, or rescinded at any time without notice, is not intended to, does not, and may not be relied upon to create any right or benefit, substantive or procedural, enforceable at law by any party in any administrative, civil, or criminal matter.