The language of a contract is to govern its interpretation, if the language is clear and explicit, and does not involve an absurdity. Okla. Stat. tit. 15, § 154 R.L. 1910, § 948.
Every contract by which any one is restrained from exercising a lawful profession, trade or business of any kind, otherwise than as provided by Sections 218 and 219 of this title, or otherwise than as provided by Section 2 of this act, is to that extent void. Okla. Stat. tit. 15, § 217 R.L. 1910, § 978; Amended by Laws 1989, SB 257, c. 359, §1, emerg. eff. 6/3/1989; Amended by Laws 2001 , SB 662, c. 406, §3, emerg. eff. 6/4/2001.
One who sells the goodwill of a business may agree with the buyer to refrain from carrying on a similar business within a specified county and any county or counties contiguous thereto, or a specified city or town or any part thereof, so long as the buyer, or any person deriving title to the goodwill from him carries on a like business therein. Provided, that any such agreement which is otherwise lawful but which exceeds the territorial limitations specified by this section may be deemed valid, but
A. A person who makes an agreement with an employer, whether in writing or verbally, not to compete with the employer after the employment relationship has been terminated, shall be permitted to engage in the same business as that conducted by the former employer or in a similar business as that conducted by the former employer as long as the former employee does not directly solicit the sale of goods, services or a combination of goods and services from the established customers of the former employer