Floor Packet Page No. 218 Amend CSHB 1 in Article II of the bill following the appropriation to the Texas Department of Mental Health and Mental Retardation by adding the following appropriately numbered rider: ____. Feasibility Study for Expansion of Rio Grande State Center. The Texas Department of Mental Health and Mental Retardation, in cooperation with the Texas Department of Health, shall study the feasibility of using any available facilities of the South Texas Hospital for the expansion of residential facilities of the Rio Grande State Center.