Commitments and Contingencies Mahrt Timber Agreements CatchMark Timber Trust is party to a fiber supply agreement and a master stumpage agreement (collectively, the Mahrt Timber Agreements) with a wholly owned subsidiary of WestRock . The fiber supply agreement provides that WestRock will purchase specified tonnage of timber from CatchMark TRS at specified prices per ton, depending upon the type of timber. The fiber supply agreement is subject to quarterly market pricing adjustments based on an index published by Timber Mart-South, a quarterly trade publication that reports raw forest product prices in 11 southern states. The master stumpage agreement provides that CatchMark Timber Trust will sell specified amounts of timber and make available certain portions of its timberlands to CatchMark TRS for harvesting. The initial term of the Mahrt Timber Agreements is October 9, 2007 through December 31, 2032 , subject to extension and early termination provisions. The Mahrt Timber Agreements ensure a long-term source of supply of wood fiber products for WestRock in order to meet its paperboard and lumber production requirements at specified mills and provide CatchMark Timber Trust with a reliable customer for the wood products from its timberlands. Timberland Operating Agreements Pursuant to the terms of the timberland operating agreement between CatchMark Timber Trust and FRC (the "FRC Timberland Operating Agreement"), FRC manages and operates approximately 413,300 acres of CatchMark Timber Trust 's timberlands and related timber operations, including ensuring delivery of timber to WestRock in compliance with the Mahrt Timber Agreements. In consideration for rendering the services described in the timberland operating agreement, CatchMark Timber Trust pays FRC (i) a monthly management fee based on the actual acreage FRC manages, which is payable monthly in advance, and (ii) an incentive fee based on timber harvest revenues generated by the timberlands, which is payable quarterly in arrears. The FRC Timberland Operat