I concur with observation posted by
@YVR123
Of course there are specific requirements. See the IRCC website for information about PR card applications. For the application form, checklist, and instruction guide, which altogether covers all the specific requirements, see
https://www.canada.ca/en/immigration-refugees-citizenship/services/application/application-forms-guides/application-renew-replace-permanent-resident-card.html
One requirement which might fit your "special requirements/restrictions" query is the requirement that the PR apply for a new card from within Canada.
BE AWARE OF POSSIBLE CHANGES:
Be aware that policy and practice can change at any time. The application form and required documents, in particular, are periodically subject to change with little or no notice.
Particular rules or regulations can also change, although the procedure for these changes involves a formal process. Technically there is notice. For example, regulation changes must be published in the Gazette before they can be implemented (with some exceptions). But few PRs, let alone PRs living outside Canada, actually follow the publication of the Gazette, so such changes may catch many PRs off-guard unless they are otherwise keeping tabs on PR obligations and related matters.
And even the statutory provisions can change. This happens far less often, and there is ordinarily a good deal of public discussion about prospective changes, at least those likely to have a significant impact, well before the changes become law and take effect. But one only needs to peruse discussions from 2014 through 2016 in the citizenship forum at this site to see massive volumes of complaining about a lack of notice that the government was changing citizenship requirements effectively increasing the amount of time a PR had to live in Canada by a year or more (such changes were subsequently rolled back by the current government, effective last October), even though there had been extensive public discussion of the prospective changes for several years prior to them even being tabled at Parliament let alone adopted and implemented. Point is, it is NOT as if individual PRs are sent notice of any such prospective changes, and many if not most PRs do NOT follow these matters closely, especially PRs living abroad. But the law, and especially the rules, can change, and it is up to the PR to be aware of how any changes might affect him or her.
Example of policy or practice change: see discussions in other topics here about credit for accompanying a Canadian citizen spouse abroad. Until recently the conventional wisdom was that the credit was available to any PR living with a Canadian citizen spouse abroad, with no regard for who might have followed whom in the process of going abroad. With a few rather extreme exceptions. We have recently learned that some IRCC officers (especially in visa offices and the IAD) are more often and more strictly applying the "accompanying" element. There is still NO formal notice or advisory about this. The actual parameters or criteria are not clear. There has been no formal change in either the applicable statute or regulation. No change in IRCC information about the credit. And, as noted, other than some caution regarding rather blatant examples (typically cases involving obvious
gaming-the-system with no near term intention to actually live permanently in Canada), posts and information in this forum (based on the conventional wisdom) was
YEARS behind recognizing the extent to which IRCC officers were more strictly approaching this. (This is similar to how long it took,
MANY YEARS in fact, to recognize the extent to which the Harper-era CIC began to more strictly apply a physical presence test rather than a residency test for citizenship, and indeed while participants in forums like this became well aware of and were sharing cautions about how severely CIC was approaching residency-based applicants, the information provided by CIC way, way understated the impact of not meeting the physical presence test, so that for many years beyond when forums like this were full of cautions, scores and scores of citizenship applicants continued to be UNPLEASANTLY surprised by what happened when they applied . . . right up to early 2015!)
