Oh, for anyone wondering what a LAD is, this is Kodak's blurb...

Laboratory Aim Density (LAD)

To maintain optimum quality and consistency in the final prints, the
laboratory must carefully control the color timing, printing, and
processing. Kodak's Laboratory Aim Density (LAD) control method
assists laboratories in setting up and controlling the electronic
color analyzer used for color timing, and the printing and duplicating
procedures. The use of the LAD control method is described in the
paper "A Simplified Motion-Picture Laboratory Control Method for
Improved Color Duplication" by John P. Pytlak and Alfred W. Fleischer,
published in the October 1976 SMPTE Journal. A simplified description
of the LAD method is outlined in KODAK Publication No.H-61A, "Using
LAD to Set Up an Electronic Color Analyzer and Control Duplicating".

To aid in color timing and curve placement, negative originals should
be timed relative to the Laboratory Aim Density (LAD) Control Film
supplied by Kodak. The electronic color analyzer used for color timing
is set-up with the LAD Control Film to produce a gray video display of
the LAD patch, corresponding to a 1.0 neutral density (gray) on the
print. The negative is then scene-to-scene timed to determine the
printer lights ("TAPE" values) for each scene, relative to the
printer/analyzer setup lights (usually TAPE 25-25-25).

There are specific LAD values for each type of print or duplicating
film that the original may be printed onto. For duplicating films,
(e.g. to make a master positive), the specified aim densities are at
the center of the usable straight-line portion of the sensitometric
curve of the film. For print film, the LAD patch is printed to obtain
a neutral gray of 1.00 visual density (1.00 Equivalent Neutral
Density) on the processed print at the setup lights (e.g. TAPE
25-25-25).

For prints intended for projection with xenon arc projectors, the
Laboratory Aim Densities for KODAK VISION Color Print Film / 2383/3383
corresponding to a 1.00 density visual gray... etc.