Is it true that in 1821 the New Mexico government allowed militia from the US to move to Texas?

In 1821, the New Mexico territory was under Spanish control, transitioning to Mexican governance after gaining independence from Spain. While there were tensions between American settlers and the Mexican government in Texas, there was no formal allowance by the New Mexico government for U.S. militias to move to Texas at that time. Instead, the era was marked by increasing American migration into Texas, which would eventually contribute to the Texas Revolution.