Englishfor English speakers
unitary
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adjective
of or pertaining to or involving the use of units
a unitary method was applied
established a unitary distance on which to base subsequent calculations
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adjective
relating to or characterized by or aiming toward unity
the unitary principles of nationalism
a unitary movement in politics
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adjective
characterized by or constituting a form of government in which power is held by one central authority
a unitary as opposed to a federal form of government
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adjective
(= one)
having the indivisible character of a unit
a unitary action
spoke with one voice
clause
Noun
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A clause is a section in a contract or other legal document.
The author's contract contained a clause giving him creative control over the films.
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A clause is a group of words that usually includes a subject and a predicate. In English, the subject usually comes before the predicate.
The last clause in the sentence is hard to understand without knowing some background.