The Following are examples of approved hand and wrist protection for Cut and thrust combat in the kingdom of Æthelmearc, with commentary and notes by Don Simon Caminante. It is hoped that this list, while not in any way exaustive, will alleviate some concerns and difficulties with the rules in this area, and will provide inspiration and guidence to those who wish to participate in this form of combat.

From the Society Rapier Marshals handbook (Aethelmearc edition, October, 2020)

9.3.1. For Cut & Thrust Combat, the backs of the hands, including fingers and 1” (2.5cm)
    above the bend of the wrist must be covered by 1/4" (6 mm) open cell foam or
    equivalent resilient padding or the protection described in section 9.3.2.

9.3.2. If at least one combatant is using a two-handed metal weapon in Cut & Thrust
    Combat, then the backs of the hands, including fingers, and 1” (2.5cm) above the
    bend of the wrist on the back half of the forearm must be covered by rigid
    protection with sufficient coverage to prevent a reasonable percussive blow from
    contacting the bones of the hand and wrist. This is also strongly encouraged for
    when using a rapier.

9.3.2.1. The rigid protection does not require padding underneath.

9.3.2.2. The coverage for rigid protection may be achieved by any combination of
    gauntlet, sword guard, or defensive object. A shield alone may be considered
    an equivalent to full hand and wrist protection only if no part of the gloved
    hand or wrist is within 4” (10 cm) of the edge of the shield while the shield is
    in use.
                        

This is complicated by the following from the glossary:

Rigid Armor:
    Material that will not significantly flex, spread apart, or deform under pressure of 12 Kg
    applied by a standard mask tester, repeatedly to any single point. Examples of rigid
    material are:

    • 22 gauge stainless steel (0.8 mm)
    • 20 gauge mild steel (1.0 mm)
    • 16 gauge aluminum, copper, or brass (1.6 mm)
    • one layer of hardened heavy leather (8 ounce, 3.2 mm)
                        

Previously, Hockey gloves and several other specific makers of gloves were specifically deemed "Rigid." In spite of the rules changes, I have not heard of these being deemed insufficient. Also, if Hockey gloves are rigid enough for heavy, they're rigid enough for us. So I think these are still acceptable.

• In Aethelmearc, Rigid wrist protection was required for all C&T fighting. This has been relaxed back to the new society "padded" standard. Rigid is still recommended, as wrist bones are tiny and don't heal well, but you no longer have to try and force your padded glove into a demi and then force all of that into a swept hilt.
• Previously, a very narrow standard was taken for what protection a sword guard would give, requiring protection from a percussive hit from "any possible angle." In practice, this made almost every hilt useless as official hand protection. This has been relaxed to "a reasonable percussive blow," which is a much more reasonable standard in my opinion.