One of the (legal ?) requirements we had to meet back in the 00s was that financial software (quant code, options trading) was "reproducible" for some length of time (7 years?). That meant: version control (SCCS, CVS, svn), archiving OS versions (SunOS, Solaris), and kit (Sun workstations and servers). I have no idea if the last 2 ("OS", hardware) is even achievable in 2021. I can always get my source code from git,…
What about having regulations updated instead of bending the industry backward to fit the outdated regulations?
It's similar to HMRC's "we can come after you for unpaid tax for 7 years", but you can only go after the HMRC for 5 years for overpaid tax.
The rules are ultimately for the benefit of long term investigations such as the LIBOR rigging, and Guinness trials.
https://www.theguardian.com/business/2016/jul/04/libor-riggi...