Conciliar bans on Saracen trade were routinely unenforced.

Evidence

Every Sunday priests were to denounce all those who had incurred the automatic excommunications for trafficking with Saracens. Heyd has pointed out that the prohibitions were always to some extent a dead letter. Here however we are more concerned with the intention than with the actual achievement. — Norman Daniel, Islam and the West, 2120

Categorization

• XREF: The gap between proclaimed Christian-Muslim separation and actual commercial practice parallels the vault’s theme of rhetorical boundary-drawing that fails in practice; the intent/achievement distinction echoes how Islam as constitutive outside operates at the level of discourse.
• QUESTION: How did this licensing/enforcement gap between proclamation and practice evolve into the later legal categories the vault tracks (e.g., racialized Muslim identities)?