Which aspect is NOT regulated in the marketing of Medicare supplements?

The marketing of Medicare supplements is subject to various regulations that aim to protect consumers and ensure they receive clear and truthful information about their options. Among these regulations, the replacement of any existing coverage is not specifically regulated in the same manner as other aspects, such as the duration of coverage, disclosure of policy benefits, and premium pricing structures.

Duration of coverage pertains to how long the benefits will last and is important for potential policyholders to understand; thus it is regulated. Similarly, the disclosure of policy benefits is crucial in providing consumers with an accurate understanding of what is covered under a policy, making it a regulated requirement as well. Premium pricing structures are also subject to regulation to ensure fairness and transparency in how prices are set and communicated.

In contrast, while there may be general guidelines or best practices regarding the replacement of existing coverage, it is not as tightly regulated in the same way that the other aspects are. This allows for greater flexibility in how agents and companies address the process of replacing a Medicare supplement policy. Consequently, this makes it the correct answer to the question about which aspect is not regulated.