[Grammar] Parallelism (do not regulate the noise / no the noise)

[nininaz]

Hello all,


If the following considered as our original sentence, will be the sentences #1 and #2 considered correct?

"The states regulate the noise created by motor vehicles but not by commercial aircraft."

I want to know 'not' refers to which part of the sentence in the parallelism structure ? (not is refers to 'the noise' or it refers to ' regulate') ?
I think both of the following sentences correct, as both have the same meanings:


1 ) "The states regulate the noise created by motor vehicles but they do not regulate the noise created by commercial aircraft."

2) "The states regulate the noise created by motor vehicles but not the noise created by commercial aircraft."

 

[jutfrank]

Yes, all sentences have the same meaning. In all three, not is negating the verb regulate, even though in the original and in 2) the verb is not repeated.

 

[nininaz]

In all three, not is negating the verb regulate, even though in the original and in 2) the verb is not repeated.

That explanations was really great help to me ,as I wanted to know "not" referred to which part of speech. So many thanks.