Section Application and Section Access script should have below details
3. Reduction Fields
in Your Example the table should look like
LOAD * INLINE [
NTNAME, ACCESS, BUDGETACCESS
Use this Budget Access field to Show/Hide the Sheet.
Section Access restricts access to your document to those users that are explicitly listed in your Section Access table. No one else will get in, UNLESS you add a line with a * in the NTNAME field and a NO in the BUDGETACCESS field.
Note that if you are not using Data reduction, but only data selection in the settings on the Document Properties->Opening tab, you will not protect your document in any way. Anyone who can add a listbox with the BUDGETACCESS field can select the YES value because it will still be available.
The difficulty with Section Access explanations is that they never describe configuration and operation in its entirety. It's way simpler for you to post an example document, and for us to show what we mean.