Can Samurai use Vambraces of the Tactician in PFS play?

[Silverhand]

Since the Samurai is the alternate class of the Cavalier, does it stand to reason that the Samurai can use the Vambraces of the Tactician?

Clearly, the Samurai can't use the teamwork feat portion, but would the vambraces boost the Samurai two class levels higher for determining the challenge class feature?

Below you'll find the entry for the item.
Please advise.
Thanks!

Vambraces of the Tactician

Price 8,000 gp; Aura moderate enchantment; CL 7th; Weight 3 lbs.

These vambraces change their appearance depending on who wears them. If the wearer is a cavalier, these vambraces display the symbol of his order. When unworn or in the hands of a non-cavalier, they appear to be an ordinary pair of steel vambraces. A cavalier wearing these vambraces is considered two class levels higher for purposes of determining the effects of his challenge class feature. Furthermore, once per day as a swift action, a cavalier with the tactician class feature can increase the area in which he grants teamwork feats. Before the end of his next turn, when the cavalier grants his allies a teamwork feat, he can grant it to all allies within 60 feet, though they must still be able to see and hear him.

[Nefreet]

This would be more appropriate in the Rules Forum, as it's not a PFS-specific question.

[FLite]

In general, if the item works for anyone with a class feature, it says "anyone with class feature." If it says only Class X I would assume it only works with class x

[Quandary]

Flagged for FAQ and transfer to the correct forum...

I also have the question of whether Favor Class bonuses for the Base Class can be used with Levels of the Alt-Class (even if not vice-versa),
as another case of how Alt-Classes counting as their Base Class work out in all applications.

[Nefreet]

I remember reading a thread specifically about that (using Ninja/Rogue as the example), and I believe the consensus was yes, you could take FCBs for the alternate classes.

[Silverhand]

Nefreet wrote:

This would be more appropriate in the Rules Forum, as it's not a PFS-specific question.

Thanks for this.

[Silverhand]

Any additional thoughts on this?