Northern Mariana Islands Long-Term Legal Residents Relief Act This bill grants Commonwealth of the Northern Mariana Islands (CNMI) Resident status to certain aliens who have resided continuously and lawfully in the CNMI since November 28, 2009. An individual with such status shall be (1) authorized to work in the CNMI; (2) issued travel documentation; and (3) inadmissible to the United States at any port of entry outside of the CNMI, with the exception of Guam in certain instances. To qualify for CNMI Resident status, an alien must meet various requirements, such as having (1) been lawfully present in the CNMI on the date of this bill's enactment or on December 31, 2018; and (2) resided continuously and lawfully in CNMI from November 28, 2009, through this bill's enactment.