Chapter 1 SI-SI A-PE-TXA This chapter is included in your selections. Sections: 1-101 Short title. 1-102 Findings – Purposes. 1-103 Definitions. 1-104 Establishment of Si-Si A-Pe-Txa. 1-105 Application of Osage Nation law and exceptions. 1-106 Enterprise Board of Directors. 1-107 Congressional review – Unauthorized disclosure.