When required by the referencing Code Section, a written procedure shall contain, as a minimum, the following technique variables:
(a) material and thickness range
(b) isotope used or maximum X-ray voltage
(c) minimum source-to-object distance
(d) maximum distance from source side of object to
the film
(e) maximum source size
(f) film brand and designation
(g) screens used
Demonstration of the density and penetrameter image
requirements of the written procedure on production