From a formal Attorney General opinion (no. 2022-L-07) responding to a query by the North Dakota Education Standards and Practices Board; it is dated Nov. 29, but was just posted on Westlaw:
… [Y]ou ask (1) whether private school teachers who are also mentors may participate in the Teacher Support System, and (2) whether private school teachers who are also mentors may receive grants to participate in the Teacher Support System. Nowhere in the applicable statute or administrative code are non-public school teachers prohibited from participating in the Teacher Support System.
However, the context of your question indicates the key issue underlying these questions is whether Article VIII, Section 5 of the North Dakota Constitution ("the Blaine Amendment") prohibits teachers at sectarian schools from receiving grants from the Teacher Support System. It is my opinion that the Blaine Amendment is not enforceable under United States Supreme Court caselaw, and therefore teachers at sectarian schools may receive grants from the Teacher Support System….