While Carta Bellamarina is based in Sarvos, it has mercantile interests throughout the Empire, and generally recruits from the local population to manage those interests as factors.  While those people may not be Catazarri, they are in every sense full members of the guild with the same rights and responsibilities as any other member, regardless of the fact that they cannot form, for example, coven bonds, with most of the guild.  This is rarely an issue because they ordinarily work in their own nation far from other guild members.

Most members of the guild are journeymen, who are regarded as competent in their own field of endeavour.  Any journeyman may challenge any Master for their position.  The matter will be put to a vote of guild members attending the next festival following the challenge.  The person with the most votes at that meeting becomes the new Master.  All Journeymen and Masters are entitled to vote.

It is possible to be apprenticed to a journeyman who is teaching a trade (although it is anticipated that most PCs will be journeymen).  Parents often apprentice their own children.  Apprentices have no voting powers and do not become full members of the guild until the member that they are apprenticed to sets them a journeyman challenge.  The success of this is judged by the Master most appropriate to the challenge (who may also declare a challenge insufficiently difficult).  If the apprentice is successful, they become a journeyman. 

The guild charter is old, and somewhat baroque in places, but was created with sufficient flexibility that it still serves to govern the guild today.  The day to day administration of the guild is performed by the Masters, known collectively as the Service.  In addition to the signeura, who is also known as the Master of Masters, there are five other masters, these being the Master of Mercenaries, who is in charge of matters martial, the Master of Mysteries, who oversees magical affairs, the Master of Musicians, who in fact governs all artistic endeavours within the guild, the Master of Merit, who concerns themselves with relationships between the guild and the church, and the Master of Merchants,  who is responsible for commerce and banking.  The Service makes decisions by majority vote with the signeura having a casting vote if necessary. 

The Service may at their discretion admit new journeymen if they are regarded as sufficiently accomplished in their own field of endeavour.  They also have the power to expel members from the guild, although this is a very rare occurrence and is generally felt to reflect badly on the masters for being were unable to solve a problem more creatively.  Masters appoint their own deputies, who may or may not change frequently, and whose job is to stand in for them should this be necessary.  The master is responsible for any action performed by their deputy.  The masters may not amend the Carta.  This must be proposed by a master with at least one festival's notice.  It requires a vote of at least half of the voting members of the guild, and a two thirds majority to pass.