The purpose of this legislation is to update existing laws to allow for longer land leases for specific Native American tribes. It aims to support the Mashpee Wampanoag Tribe and the Wampanoag Tribe of Gay Head (Aquinnah) by enabling them to lease their lands for up to 99 years. This change is intended to provide these tribes with greater flexibility and security in managing their land. The key provision of this law is the amendment to the Long-Term Leasing Act, which previously limited the duration of land leases for certain tribes.