CONTINUATION OF OFFICES IN MUNICIPALITY CHANGING TO TYPE A GENERAL-LAW MUNICIPALITY.
Tex. LOC. GOV'T Code § 22.002.
in effectIf a municipality changes to a Type A general-law municipality under Subchapter B of Chapter 6 , the officers serving in the municipality on the date of the change shall continue in office until their offices are superseded in conformity to the law applying to Type A general-law municipalities.
