On the 2006-2007 National Letter of Intent that my son signed last November there was no such section. The intent letter only stated that there must be a written offer of athletics financial aid. There wasn't any mention of the percentage that my son's scholarship was in relation to the 11.7 allowed.
I went to the web site www.national-letter.org -but they do not allow you to download the NLI. You might be able to get one by request from their office. There is a copy of the 2003 NLI on www.prospectswatch.org. I didn't see any reference to the ncaa equivalency you mentioned.
Son signed with a D-1 school. I would think that all other D-1 schools would use the same forms. I could be mistaken though.