(a) The owner or operator of each vent gas stream, pressure relief valve, and flare in Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller Counties shall demonstrate compliance with the requirements of this division (relating to Vent Gas Control) as soon as practicable, but no later than December 31, 2005, with the exception of the following:(1) §115.722(a) and (c)(2) of this title (relating to Site-wide Cap and Control Requirements) for which the owner or operator shall demonstrate compliance as soon as practicable, but not later than January 1, 2007;(2) §115.722(b) and (c)(1) of this title for which the owner or operator shall demonstrate compliance as soon as practicable, but no later than April 1, 2006; and(3) the exemption in §115.727(f) of this title (relating to Exemptions) will no longer apply upon public notice of revocation by the commission. Upon revocation of §115.727(f) of this title, sites subject to this division located in the Houston/Galveston/Brazoria area, as defined in §115.10 of this title (relating to Definitions), excluding Harris County, shall comply with paragraphs (1) and (2) of this subsection by the dates specified in those paragraphs, or within 180 days of public notice, whichever is later.(b) For vent gas streams, flares, and pressure relief valves that become subject to the requirements of this subdivision after December 31, 2005, testing and monitoring must be conducted as soon as practicable, but no later than 60 days after being brought into highly-reactive volatile organic compound service.