(a) The owner or operator of each cooling tower heat exchange system in Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery, and Waller Counties shall demonstrate compliance with this division (relating to Cooling Tower Heat Exchange Systems) as soon as practicable, but no later than December 31, 2005, with the exception of the following:(1) §115.761(a) and (c)(2) of this title (relating to Site-wide Cap) for which the owner or operator shall demonstrate compliance as soon as practicable, but no later than January 1, 2007;(2) §115.761(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 §115.767(6) of this title (relating to Exemptions) will no longer apply upon public notice of revocation by the commission. Upon revocation of §115.767(6) 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 cooling tower heat exchange systems that become subject to the requirements of this division 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.