Tex. Est. Code § 403.054

During an independent administration, a secured creditor whose claim is a preferred debt and lien against property securing the indebtedness under Section 403.052 is free to exercise any judicial or extrajudicial collection rights, including the right to foreclosure and execution; provided, however, that the creditor does not have the right to conduct a nonjudicial foreclosure sale within six months after letters are granted.