What about using the inStr function to see if the value is in the string, and if the condition is true (not zero) then concatenate the description of that restriction code onto a full description string.

Maybe something like this:

fullDescription = ""

if inStr({UDF_RESTRICT}, "1") then

fullDescription = fullDescription + " No 3rd Party Sales "

if inStr({UDF_RESTRICT}, "2") then

fullDescription = fullDescription + " No Amazon "

... and so on, for each restriction code...

and finally, return fullDescription when through

formula = fullDescription

(This leaves out the logic to determine when to insert commas between the code descriptions.)

For the commas, you really just need to worry about the first code description to be concatenated to the full description string. If it is not empty, then you could start each string to be concatenated with a comma and space (e.g. ", No Amazon"); but if it is empty then the code description should not contain a comma.

So, inserting the following for each conditional might work:

if inStr({UDF_RESTRICT}, "1") then

if fullDescription = "" then

fullDescription = fullDescription + "No 3rd Party Sales"

else

fullDescription = fullDescription + ", No 3rd Party Sales"