You can, but you can’t really just copy and paste it… but we’ll get to that.
Let’s fix your original, first. …passage in 1999 of the Anti-Cybersquatting… has no meaning I’m sure it was just an oversight, so let’s change it to:
…passage in 1999 of the Anti-Cybersquatting act…
Let’s add a bit more to that so that we have a functional sentence:
The proliferation of cybersquatters led to the passage in 1999 of the Anti-Cybersquatting Act.
Now, we have enough to work with.
OK, on to moving stuff around:
In 1999, the proliferation of cybersquatters led to the passage of the Anti-Cybersquatting Act.
This sentence is ambiguous and could mean several things–it could mean that the proliferation happened in 1999, that the act was passed in 1999, or that both occurred in 1999.
The 1999 proliferation of cybersquatters led to the passage of the Anti-Cybersquatting Act.
This sentence (notice that we left out the word “in”) means that the proliferation occurred in 1999. No information is directly given about when the act was passed.
The proliferation in 1999 of cybersquatters led to the passage of the Anti-Cybersquatting Act.
This sentence also refers to the proliferation as happening in 1999 and gives no direct information about when the act was passed.
The proliferation of 1999 cybersquatters led to the passage in of the Anti-Cybersquatting Act.
This is also ambiguous, but for a different reason. Were the cybersquatters proliferating in 1999 (date) or were there 1999 of them (number)?
The proliferation of cybersquatters in 1999 led to the passage of the Anti-Cybersquatting Act.
This also implies that the proliferation occurred in 1999 and that the act was passed at some unspecified time afterward.
The proliferation of cybersquatters led in 1999 to the passage of the Anti-Cybersquatting Act.
This sentence does the opposite of the above examples–it states when the act was passed, but doesn’t specify exactly when the proliferation occurred. in 1999 should probably be set off with commas, though it’s not strictly necessary.
The proliferation of cybersquatters led to the 1999 passage of the Anti-Cybersquatting Act.
Again, we’ve dropped the word “in”. And again, the date applies to the passage of the act and not to the proliferation.
The proliferation of cybersquatters led to the passage in 1999 of the Anti-Cybersquatting Act. (the original)
This sentence means that the act was passed in 1999 because of previous proliferation of cybersqutting.
The proliferation of cybersquatters led to the passage of the 1999 Anti-Cybersquatting Act.
Similar to the above, except that readers might think that the name of the act is The 1999 Anti-Cybersquatting Act.
The proliferation of cybersquatters led to the passage of the Anti-Cybersquatting Act in 1999.
This sentence almost certainly tells when the act was passed, but it could also refer to both the proliferation and to the passage.