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The mailers, addressed to the "student" of the household, include sections encouraging youth to speak with a "safe adult" or one of several advocacy groups if their parents don't support their identity. The mailers say parents' don't need to be involved with a student's transgender identity and include a section about emancipation, when a minor becomes legally recognized as an adult.

A Texas Tribune review of online records shows a limited liability company, the Texas Transgender Student Union, was formed in early September in Wyoming, according to the state's business records.