Final answer:
The regulations issued by executive branch agencies that affect the management of grants can be found in the Code of Federal Regulations (CFR) and the Federal Register.
Step-by-step explanation:
The regulations issued by executive branch agencies that affect the management of grants can be found in the Code of Federal Regulations (CFR). The CFR is a compilation of all regulations issued by federal agencies and is organized by subject matter. It provides detailed information on the rules and requirements governing various aspects of grant management. The Federal Register is another important resource where executive branch agencies publish proposed and final regulations before they are incorporated into the CFR.