(a) Pursuant to Section 2(a) of HB 2935 enacted by the 80th Legislature and subject to subsection (b) of this section, this subchapter does not prohibit a wholesale dealer or retailer from selling existing inventory of cigarettes on or after January 1, 2009, provided that the state tax stamps were affixed to the cigarettes before January 1, 2009, and the quantity is comparable to the quantity of cigarettes purchased during the previous year.(b) Pursuant to Section 2(b) of HB 2935, a person may not sell or offer for sale a cigarette in this state that does not comply with this subchapter after January 1, 2010.