Regex that validates Active Directory default password complexity

Question

I have a list of passwords that I need to examine and determine if they meet the default 3 of 4 rule for AD.

Rule is contain 3 of the 4 following requirements: low

Answer 1

Does it have to be all one big regex? You could do 4 regexes, each checking one thing and then make sure 3 of the 4 are matches. That would be easier, less error prone and more maintainable.