Africa's governments are procuring AI and digital systems at speed. Revenue authorities, ministries, courts, social protection bodies, and local authorities are acquiring platforms that restructure their internal operations. The governance frameworks surrounding this transformation continue to start too late. This paper argues that the most consequential governance decisions are made not at deployment or regulation, but at procurement. Through procurement, governments determine who controls the data, who can audit the system, whether the state can exit the vendor, and whether public institutions retain meaningful authority over the public functions those systems touch. The paper advances three interlocking doctrines ; Continuous Administration, Administrative Hosting Capacity, and the Procurement Entry Doctrine as a governance architecture for digital public procurement in Africa. It grounds this argument in documented African procurement experiences including Uganda, Zimbabwe, and the DRC, and concludes with the AGCIH Procurement Governance Matrix: a scored readiness tool for public institutions before digital system acquisition.