Suspended NFL WR Josh Gordon on Stamps Negotiation List

What happened to the CFL 'Ricky Williams Rule" stating that players under NFL suspension are not able to sign contracts to play in the CFL? LaVon Brazill was suspended indefinitely from the NFL, for his second violation of the substance policy, but is now playing for the Argos? Now, the Stamps have added Josh Gordon to their negotiation list? What gives?

Gordon is under contract and cant play in the CFL.
Brazill was released and can play in the CFL.

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