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MOSSO--anyone have any insight as to whether this is Open-chart legal?

One of my partners and I have been looking at the MOSSO system by Richard Granville and David Burnhttps://ebooksbridge.com/www/ebb/index.php?main_page=ebb_product_book_info&cPath=138_136&products_id=739

Anyone have any familiarity with this, and any insight whether it would be Open-chart legal?

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