Which function allows an agency to create regulations that clarify its statutory mandate?

The function that allows an agency to create regulations that clarify its statutory mandate is rulemaking. This process involves agencies developing detailed regulatory provisions that elaborate on and operationalize the broad directives set forth in statutory law. Through rulemaking, agencies can fill in gaps in legislation, adapt rules to changing circumstances, and provide clarity on how laws will be implemented and enforced.

Rulemaking typically involves a notice-and-comment period, where stakeholders and the public can provide input on proposed regulations. After considering this feedback, agencies can finalize rules that reflect their interpretation and application of statutory requirements. This ensures that there is a structured framework in place for achieving the objectives of the legislation while also allowing for public participation and transparency in governance.

Other choices involve different agency functions that do not focus on creating regulations. Adjudication refers to the process by which agencies resolve disputes and make determinations regarding individual cases or specific issues under the law. Enforcement pertains to the execution of laws and regulations, ensuring compliance with established rules. Investigation involves the gathering of evidence and information related to potential violations of law or regulation but does not involve creating regulatory frameworks. Thus, rulemaking distinctly serves as the mechanism for agencies to clarify and elaborate on their statutory duties through regulations.