The image must have adequate brightness and contrast.
The skin tone should be natural.
It should show a close up of the head and (partial) shoulders.
The image should be straight looking, centered with neutral expression.
Face should be in sharp focus and clear with no ink marks/creases/lines.
The face (from forehead edge to bottom of chin) should be 70 to 80% of the photo or one inch height.
The eyes must be open and no hair obscuring the face.
Prescription glasses if worn should be clear and thin framed and should not have flash reflection or obscure the eyes.
Head coverings, hair, head-dress or facial ornaments should not obscure the face.
There must be no other people or object in the photo.
The lighting must be uniform with no shadows on the face or behind.
Red eye photos are not allowed.
No lines are allowed.
The photo should be printed by professional photo studio with continuous tone; and good resolution.
In the case of babies eyes can be closed.