CRL Confusion...

[Drichar]

At least TWO armor components below the waist (codpiece, a set of thigh, a set of knee, a set of shin, and/or a set of foot armor). Pairs of armor like thighs, knees, shins, and boot are considered ONE piece as a set.
Knee armor is required. Knee coverage may be hard or soft, but must be "in universe" and high-quality.  Extended shins that cover knees also count as knee armor.

So.....

Knee armour is compulsory?
Would TK lower leg armour be a good substitute?

[Ref Al'drann]

Yes, you must have armor coverage over your knees in some form. If you're using TK leg armor as a shin/knee combo, you must have the sniper diamond on both like Dengar does.

[Drichar]

Ok, thinking cap on

[Hondo Karr]

2 pieces below the waist is minimum. A cod or loin covering is required and knee coverage is required. So, your two minimum pieces are set forth by the CRL's. Anything beyond that is gravy.

[Jaro]

Yes, you must have armor coverage over your knees in some form. If you're using TK leg armor as a shin/knee combo, you must have the sniper diamond on both like Dengar does.

What is the reason you have to have the diamond on them?

[Rot Col'e]

These are my shin/knee armor.

[Jaro]

And here are two of us from Ge'tal Vheh:

[Drichar]

Cheers for the pics brothers, got it

[Hondo Karr]

What is the reason you have to have the diamond on them?

Refering tot he TK shins... TK shins do not come "diamond attached". In fact, they come with 1 diamond to go on the kneeling knee and one to be kneeless. So, if you were to use straight up TK shins you would either have to get or make 2 diamonds or do something custom for the coverage 

[Jaro]

Ah! That makes a bit more sense!