The commission may, upon request or on its own initiative, authorize provisions other than those set forth in §336.729 of this title (relating to Disposal Site Design for Near-Surface Land Disposal), §336.730 of this title (relating to Near-Surface Land Disposal Facility Operation and Disposal Site Closure), and §336.731 of this title (relating to Environmental Monitoring) for the segregation and disposal of waste and for the design and operation of a land disposal facility on a specific basis, if it finds reasonable assurance of compliance with the performance objectives of this subchapter.