In the federation, the purpose of enumerating the powers of the central government is to

The purpose of enumerating the powers of the central government in a federation is to limit its powers against those of the units. This means that the central government is granted only certain specified powers, while the units retain all other powers not specifically granted to the central government. This serves as a check on the central government's power and helps to ensure that the units maintain a degree of autonomy and independence. By limiting the central government's powers, the constitution seeks to prevent it from becoming too dominant or oppressive over the units, thereby promoting a balanced and equitable distribution of power.