Originally Posted by notEnuf

117.21(e) refers to 117.25(e) for conversion to SC.

No certificate holder may schedule and no flightcrew member may accept an assignment for any reserve or flight duty period unless the flightcrew member is given a rest period of at least 10 consecutive hours immediately before beginning the reserve or flight duty period measured from the time the flightcrew member is released from duty. The 10 hour rest period must provide the flightcrew member with a minimum of 8 uninterrupted hours of sleep opportunity. 117.25(e)

No memntion of 30/168 only 10. Also the flight crew may not accept... that's exactly what they must do, refuse. The flightcrew member is not responsible for the certificate holders actions.