A budget code is a reference to the specific cost you make as a committee. It is linked to the AUCSA Budget 2019-2020 document which will be sent out to all AUCSA members. In this Excel file, the sheets which explain the expenses of the AUCSA and all its committees are put in alphabetical order and numbered. AUCSA Events is sheet number 1, AUCSA Other is sheet number 2, and RAW is sheet number 23 for example. Make sure you know what sheet number your committee is!
A budget code consists of 4 digits and looks for example like this: 1.c.3.2.
In summary, the example budget code 1.c.3.2 refers to the transportation costs for Intro Weekend by AUCSA.