Sheet Protection Question

[bowlinbd]

I have a protected worksheet in which A1:L1 contain headers. I want to allow the inserting of both rows and columns; however, I don't want to allow the insertion of columns between A:L or the insertion of rows above row 1. I don't really care what happens to the columns after L or the rows below row 1. Is this even possible?

 

[bowlinbd]

Edited to add that only cells A1:L1 are locked. The rest of the sheet is unlocked.