I believe RIR should have single combs....if so, that's not a RIR.
You might find a thread for serious RIR breeding here:
https://www.backyardchickens.com/search/36971053/?q=Rhode+Island+Red&t=post&o=relevance&c[title_only]=1&c[node]=14
I was able to borrow a APA SOP book from my state wide...