From Lexicanum

Librarian

Lexicanium - Codicier - Epistolary - Chief Librarian

Codiciers are the second rank of Space Marine Librarians.¹ Their tasks include evaluating of the reports written by the Lexicanium and finalizing them for inclusion to the Librarius, as well as providing strategic overviews of campaigns.²

As their powers and control increase, they will be promoted to Epistolary.

Sources

• ¹ Codex: Space Marines (5th Edition)
• ² Index Astartes I - Psykana Librarius Space Marine Librarians

Space Marine Infantry
Command	Master • Captain • Master of Sanctity • Reclusiarch • Epistolary • Codicier Command Squad • Apothecary • Company Standard Bearer • Company Champion
Standard	Tactical • Assault • Devastator • Scout • Veteran • Tyrannic War Veterans • Honour Guard
Terminators	Terminator Squad • Terminator Assault Squad • Terminator Command Squad