In an article published June 17th, the Texas Tribune quotes Governor Abbott as saying, “Businesses … they’ve always had the opportunity and the ability, just like they can require people to wear shoes and shirts, these businesses can require people to wear face masks if they come into their businesses.”
According to the Equal Employment Opportunities Commission (see FAQ G.2) an employer can require employees to wear protective gear (such as face coverings or gloves). Employees may make a request for a reasonable accommodation under the ADA or a religious accommodation under Title VII of the Civil Rights Act (such as a modified mask that can be worn with a religious head covering). Employers should provide the modification or an alternative modification unless it would create an “undue hardship” for the employer.
Note Some counties are including price fixing and price gouging provisions in their local emergency orders. Read your county's local emergency order for details.
We have been unable to locate a Texas or Federal law that would prevent a business from placing limits on how much of a product an individual can purchase. Generally, businesses may set their own policies.