Ritual Mask Feat in PFS?

[Nohwear]

Half of the Ritual Mask feat deals with occult rituals. The other half deals with spirit class features. Thus, I have to wonder if it is legal or not? If it is legal, do you ignore the part of the requirement to know an occult ritual? The feat in question is part of the Nameless One feat chain from Arcane Anthologies. I can not find a source to create a link with.

[The Morphling]

If it's not on this list, it's not legal.

[Nohwear]

Looking at the Additional Resources section, there is an oversight one way or another. Either it is supposed to be legal, with the Occult Ritual requirement waived, or they did not intend it to be legal.

[Imbicatus]

Additional Resources wrote:

Pathfinder Player Companion: Arcane Anthology

Archetypes: All archetypes in this book are legal for play except the deep marshal. The eldritch scoundrel is not available for use with the unchained rogue: Feats: All feats in this book are legal for play; Spells: All spells in this book are legal for play except cyclic reincarnation, fool's gold, Jatembe's ire, legendary proportions, and tears to wine; Spellbooks: All spellbooks in this book are legal for play except Last Azlanti's Analects and Six Warriors. These spellbooks do not allow access to otherwise banned spells. The prayer and meditation book rituals on pages 4–5 are legal for play; Traits: All traits on page 10 are legal for play except Arodenite Historian; Misc.: The variant spellcasting options on page 7 are legal for play. The philanthropic magic arcanist discovery on page 17 is legal for play. The anointings on pages 22–23 are legal for play, except the eldritch enhancement option. The arrowsong's lament masterpiece on page 31 is not legal for play.

The feat is legal. While most of it deals with occult rituals which are not legal, the ability to boost Shaman hexes or spirit abilities is. As for the prerequisite, I think that was an oversight.