(a) The numbering pattern used consists of the prefix "TX" followed by a combination of exactly four numerals and further followed by a suffix of two letters. The group of numerals appearing between the letters shall be separated from the letters by hyphens or equivalent spaces.
(b) All basic numbers of each series shall begin with 1000. TX-1000-AA through TX-9999-AA will be allotted to dealers and manufacturers. TX-1000-AB through TX-9999-ZZ will be allotted to all other vessel owners and livery operators.
(c) The letters "G", "I", "O", and "Q" shall be omitted from all letter sequences.