Software systems can be validated as conforming to the CERT Perl Secure Coding Standard. Source code analysis tools, including compilers and static analysis tools, can be certified as able to validate source code as conforming to this standard.
...
Deviations may occur for a specific instance, typically in response to circumstances that arise
during the development process or for a systematic use of a particular construct in a particular circumstance. Systematic deviations are usually agreed upon at the start of a project.
...