This is the Marans standard, I will put the specific Black Copper Faults that I find below.
Standard of the Marans
Disqualifications
Yellow on shanks or toes. White ear lobes.
Standard Weights
Cock
.
..8 lbs. Hen
7 lbs.
Cockerel
.7 lbs. Pullet
..6 lbs.
ShapeMale
COMB: Single, moderately large, straight, upright, evenly serrated with five points.
BEAK: Long, stout and well curved.
FACE: Smooth, skin fine and soft in texture.
EYES: Large and prominent.
WATTLES: Medium in size, oval.
HEAD: Moderately large in size, slightly flattened on top.
NECK: Of medium length, broad and deep, well balanced. Hackle well developed, moderately flowing over shoulders.
TAIL: Full, rather short, moderately well spread, carried at an angle of 55 degrees above horizontal.
WINGS: Short, held close to the body, carriage nearly horizontal.
BREAST: Strong, broad, and full, well rounded when viewed from both the front and side.
BACK: Wide at the shoulders, long, flat, slightly tilted to the rear. Slightly more inclined that of the female.
BODY AND FLUFF: Body deep, long and broad, especially through the shoulders and carried high. Overall rectangular in shape. Fluff medium in length.
LEGS and TOES: Legs set well apart, straight when viewed from the front. Shanks-moderately long and smooth. Toes-four, well spread and straight and of medium length.
PLUMAGE: Moderately tight and smooth textured.
ShapeFemale
COMB: Single, moderately large, straight, upright, evenly serrated with five points. When in production Marans females commonly exhibit a lopped comb which shall not be penalized on an otherwise good specimen.
BEAK: Long, stout and well curved.
FACE: Smooth, skin fine and soft in texture.
EYES: Large and prominent.
WATTLES: Medium in size, oval.
HEAD: Moderately large in size, slightly flattened on top.
NECK: Of medium length, broad and well balanced, moderately close feathered.
TAIL: Full, rather short, moderately spread, carried at an angle of 45 degrees above horizontal.
WINGS: Short, held close to the body, carriage nearly horizontal.
BREAST: Strong, broad, and full, well rounded when viewed from both the front and the side.
BACK: Wide at the shoulders, long, flat, slightly tilted to the rear. Slightly less inclined that of the male.
BODY AND FLUFF: Body deep, long and broad, especially through the shoulders and carried high. Overall rectangular in shape. Fluff medium in length.
LEGS and TOES: Legs set well apart, straight when viewed from the front. Shanks-moderately long and smooth. Toes-four, well spread and straight and of medium length.
PLUMAGE: Moderately tight and smooth textured.
Clean-Legged Marans
Disqualifications
Any feathers or stubs appearing on shanks or toes.
Feather-Legged Marans
Lightly feathered down outer sides of moderately long shanks. Outer toes lightly feathered to the end. The middle or inner toes, free from feathering.
Disqualifications:
Feathers on middle or inner toes.
In the Marans, this required silhouette must symbolize one of the
undeniable characteristics constituting the signature of the breed.
Without locking it up into a too-precise diagram, the silhouette of the Marans is simple but characteristic:
The back, slightly inclined, never short, takes part in the construction of the particular type of the Marans.
The body, when it fits into a rectangle, shows the minimum length desired for a good perception of the standard type.
The shanks in particular are always rather average in size, and the overall the whole of the animal fits into an almost perfect square.
The slope of the tail forms an angle of 45° to a maximum of 60° compared to a horizontal line.
Black Copper Standard/Faults according to the French Standard (I cant link to the U.S. right now, it's error/site closed)
Serious Defects: Brown-red variety (Our Black Copper)
Cock : brown wing bay; any other colour than black on the flights; straw- coloured hackles.
Hen : brown spots on the body.