That 1400' is only good if you are ON the radial or loc inbound within 10nm of TAM. Look at the MSA. If they told you to maintain 3,000, cleared for the approach, then stay there until at least you complete the procedure turn, the loc comes alive and you are within 10nm of TAM. Then you can descend to 1400. I know it's a short distance. If you go down to 1400 on your way out, then turn off the course to do the procedure turn, you may not know what you might run into.