Form the early.txt

AddOffice:: FN_SPANISH royal_palace "Lord Chamberlain" +2 +2 0 0 0 0 0
AddOffice:: FN_SPANISH constables_palace "Captain of the Stables" +2 0 0 2 0 0 0
AddOffice:: FN_SPANISH marshals_palace "Captain-General" +2 0 0 2 0 0 0
AddOffice:: FN_SPANISH chancellery "Keeper of the Privy Seal" +3 1 0 1 0 0 0
AddOffice:: FN_SPANISH admiralty "Lord High Admiral" +1 0 0 2 0 0 0
AddOffice:: FN_SPANISH cathedral "Archbishop of Toledo" 0 2 0 0 3 0 0

so it wouild seem you need a chancellery.