The Environmental Protection Agency is making an interim final determination to stay the imposition of offset sanctions and to defer the imposition of highway sanctions based on a proposed approval of a revision to the Clark County Department of Air Quality (Clark or DEQ) portion of the Nevada State Implementation Plan (SIP) published elsewhere in this Federal Register. The SIP revision concerns six permitting rules (referred to as Sections) submitted by Clark: Sections 0--Definitions, 12.0--Applicability, General Requirements and Transition Procedures, 12.1--Permit Requirements for Minor Sources, 12.2--Permit Requirements for Major Sources in Attainment Areas, 12.3--Permit Requirements for Major Sources in Nonattainment Areas, 12.4--Authority to Construct Application and Permit Requirements For Part 70 Sources, and subsection 12.7.5 of Section 12.7--Emission Reduction Credits.