Sentence:  It would authorize the Texas Education Agency to establish county-wide day schools for the deaf in <WSD>counties</WSD> of 300000 or more population , require deaf children between 6 and 13 years of age to attend the day schools , permitting older ones to attend the residential Texas School for the Deaf here . 
Meaning of the word marked with <WSD> tags:  (United Kingdom) a region created by territorial division for the purpose of local government