In the past, although LSAC's policies have stated that those wishing to take the LSAT could do so no more than three times in two years, there was always a nifty loop hole students could invoke: Getting a law school to ask LSAC for one more test date. LSAC would approve it, and the student was free to take the LSAT, even if they had exhausted the "official" number of times they could take the test.
That loop hole has now been sealed shut.
As per an email we recently received from LSAC:
We have a change in the policy related to applicants who wish to take the LSAT more than three times in two years. Applicants may not take the LSAT more than three times in any two-year period. This policy applies even if the applicant cancels their score or if the score is not otherwise reported. LSAC reserves the right to cancel the applicant’s registration, rescind their admission ticket, or take any other steps necessary to enforce this policy. Previously, candidates could request a waiver of this policy from law schools. That no longer will be possible. Instead, in exceptional circumstances only, candidates can ask LSAC directly for a waiver of this policy.
We don't know what LSAC considers to be "significant extenuating circumstances;" however, we're pretty sure that it's safe to say there won't be very many students taking more than three LSAT in two years in the future. LSAC is notoriously strict when it comes to handing down exceptions to their rules.
If you would like to try your luck, though, you can do so by submitting a signed, detailed explanation addressing the circumstances that you feel make you eligible to retake the LSAT, and specifying the date that you wish to take the test. Your request must be in writing, submitted either via email (LSACinfo@LSAC.org) or fax (215.968.1277). As with accommodated testing requests, LSAC recommends that you submit your request well in advance of the date you wish to take the test on, in order to give them time to evaluate your request and render a decision. And, of course, LSAC's decisions are final.
The upshot? Think long, hard, and carefully about when you're taking the LSAT, and make sure that when you take it you're well prepared. And remember, a cancelled score still counts as a taken LSAT.
More information about the limitations on test taking is available on the LSAC website.