I have a confession to make. Up until about ten years ago, our library was not using the correct agency code in the 040 tag. We had used the same one for so long…. I guess everyone thought it was correct, or that it didn’t matter as long as we knew what was going on. WRONG!
Ten years ago we submitted our first subject heading proposal to the Library of Congress. They soon set us straight! That led me to wonder if any other libraries out there are using an incorrect code (made up by the institution) in the 040 tag.
Our correct agency code is CaNSH. The breakdown for this code is as follows: Ca (Canada) NS (Nova Scotia) H (Halifax). There is a web link that describes how the agency codes are structured.