This bill proposes to amend the Federal Lands Recreation Enhancement Act to mandate the acceptance of cash payments for entrance fees at units of the National Park System. The legislation specifically directs the Secretary of the Interior to require that any park unit charging an entrance fee must accept cash. This provision aims to ensure that all visitors, including those who may not have access to electronic payment methods, can readily pay for entry. By guaranteeing cash as a payment option, the bill seeks to preserve equitable access to national parks and federal recreational lands for all Americans.