How would I cite Regulation O taking precedence over state law with regards to individual lending limits? I was told that the more strict rule applies but how would I cite this?

215.2

\2\ Where State law establishes a lending limit for a State member bank that is lower than the amount permitted in section 5200 of the Revised Statutes, the lending limit established by applicable State laws shall be the lending limit for the State member bank.

Thank you.