Definitions for terms that appear throughout this subchapter may be found in this section, in Subchapter A of this chapter (relating to General Financial Assurance Requirements), as well as Chapter 311, Subchapter H of this title (relating to Regulation of Quarries in the John Graves Scenic Riverway), except where the following terms are used in this subchapter, the following definition applies: Current cost estimate--The amount of financial assurance required under Chapter 311, Subchapter H of this title.