The Oklahoma position on general contracting
The Oklahoma state government issues no general contractor license. The Oklahoma Construction Industries Board's frequently asked questions page says that general contractors are not currently required to hold a state license in Oklahoma [1].
The state's business licensing page on building and general construction contractors makes the same point about state licenses and then sets out the range of construction services it has in mind [2]. Besides commercial or residential buildings, its list takes in road, bridge and highway work, utility installation for homes and municipalities, and industrial and oil field installations, and it leaves room for other projects as well [2].
That page is titled Building and General Construction Contractors and forms part of the state's business licensing material on Oklahoma.gov [2]. In its wording, the list of projects follows the statement about state licenses and spells out what the construction services in that statement include [2]. The point about state licenses is made for every item on that list, including the other various projects with which the list closes [2].
Why the Board is named here
The agency shown for Oklahoma is the Oklahoma Construction Industries Board. It appears on this page because the FAQ statement above is its own, and because the Board is the state agency named for plumbing, electrical, mechanical and roofing work.
The Board's statement on general contractors appears as an answer on its frequently asked questions page, and it is written about general contractors as a group, with Oklahoma named as the state [1].
What the two statements reach
Both sources speak about state licenses held by general contractors. Neither one says that construction work in Oklahoma goes unlicensed, and this page does not say so either.
Reading the two sources together
The Board's answer speaks of general contractors and a state license, and its word "currently" places the statement in the present [1]. The business licensing page states its point without that word. It speaks of state licenses in the plural and ties the point to the construction services general contractors perform [2]. On general contractors and a state license, the two pages say the same thing.