In some ways it is fairly simple; you define the rules, and then you determine how they get applied using the Patron Services parameter Consortium Circulation. There is a fairly good description in this PDF version of an older manual (PDF page 260).
Since 2009 we’ve used the combination of Transacting & Lending library, which means the rules set up for the CKO library are the ones that are followed.
There are some settings that are only set at the system level, which means everyone has to decide on the same thing in terms of the setting.
And you should make the setting for who sends out the notices consistent as well. We use the patron’s registered library so they only get ONE lost notice.
Or, if you’re a magician like @kfrench & @sstmartin over at GMILCS you can get everyone in the consortium to agree on one uniform set of rules Strength in Consistency: A Consortium's Journey Toward Uniform Settings - do loan rules really define a library? Do most library directors even know what their own loan rules are (I’m not suggesting they should)?
PS Searching Conferences & Events and Clearinghouse Repository here on the forum will let you see most publicly accessible presentations and guides.