Section 37.152 - Grounds for Reduction of Service(a) Unless the commission issues a certificate that the present and future convenience and necessity will not be adversely affected, a certificate holder may not discontinue, reduce, or impair service to any part of the holder's certificated service area except for:(1) nonpayment of charges;(3) another similar reason that occurs in the usual course of business.(b) A discontinuance, reduction, or impairment of service must be in compliance with and subject to any condition or restriction the commission prescribes. Acts 1997, 75th Leg., ch. 166, Sec. 1, eff. Sept. 1, 1997.