Site Feedback

Website Feedback

This contact form is only for website help or website suggestions. If you have questions or comments regarding a published document please contact the publishing agency. Comments or questions about document content can not be answered by OFR staff. Please do not provide confidential information or personal data.

Title 36

Displaying title 36, up to date as of 7/16/2026. Title 36 was last amended 6/05/2026.
view historical versions
  1. Title 36 —Parks, Forests, and Public Property
  2. Chapter I —National Park Service, Department of the Interior
  3. Part 51 —Concession Contracts
  4. Subpart G   View Full Text
  • Details
  • Print
  • Search
  • Subscribe
  • Timeline
  • Go to Date
  • Published Edition
  • Developer Tools
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 36Parks, Forests, and Public PropertyPart / Section
Chapter INational Park Service, Department of the Interior1 – 199
Part 51Concession Contracts51.1 – 51.104
Subpart GLeasehold Surrender Interest51.51 – 51.67
§ 51.51What special terms must I know to understand leasehold surrender interest?
§ 51.52How do I obtain a leasehold surrender interest?
§ 51.53When may the Director authorize the construction of a capital improvement?
§ 51.54What must a concessioner do before beginning to construct a capital improvement?
§ 51.55What must a concessioner do after substantial completion of the capital improvement?
§ 51.56How will the construction cost for purposes of leasehold surrender interest value be determined?
§ 51.57How does a concessioner request arbitration of the construction cost of a capital improvement?
§ 51.58What actions may or must the concessioner take with respect to a leasehold surrender interest?
§ 51.59Will a leasehold surrender interest be extinguished by expiration or termination of a leasehold surrender interest concession contract or may it be taken for public use?
§ 51.60How will a new concession contract awarded to an existing concessioner treat a leasehold surrender interest obtained under a prior concession contract?
§ 51.61How is an existing concessioner who is not awarded a new concession contract paid for a leasehold surrender interest?
§ 51.62What is the process to determine the leasehold surrender interest value when the concessioner does not seek or is not awarded a new concession contract?
§ 51.63When a new concessioner pays a prior concessioner for a leasehold surrender interest, what is the leasehold surrender interest in the related capital improvements for purposes of a new concession contract?
§ 51.64May the concessioner gain additional leasehold surrender interest by undertaking a major rehabilitation or adding to a structure in which the concessioner has a leasehold surrender interest?
§ 51.65May the concessioner gain additional leasehold surrender interest by replacing a fixture in which the concessioner has a leasehold surrender interest?
§ 51.66Under what conditions will a concessioner obtain a leasehold surrender interest in existing real property improvements in which no leasehold surrender interest exists?
§ 51.67Will a concessioner obtain leasehold surrender interest as a result of repair and maintenance of real property improvements?
eCFR Content