The better - but more rare - standard for an artist is known as delivering technically satisfactory recordings. Under this standard, as long as a recording is done using the proper sonic equipment, the company does not have the same leeway to reject the tracks. This standard is usually reserved for midrange and superstar artists.
Along with the standards set forth above, labels generally add other delivery requirements to the contract. Some of the most common are the following: (a) tracks must be recorded during the term of the contract, (b) songs must be new (not previously recorded by the artist), (c) tracks are studio recordings, (d) material does not infringe upon someone else's copyright, (e) songs must have a minimum length (normally at least two minutes), (e) recordings feature only the artist's performance, and (f) recordings are not completely instrumental.
The delivery portion of the recording contract might seem insignificant on its face, but the way it is phrased can become quite important. Therefore, an artist should seek to have the technically satisfactory language added to the contract if at all possible.
Ben McLane Esq