Relevant section is 8.A.4.b.ii a deadhead is included in a single duty period exceeding 11:30 (lead in verbiage is A class of service higher than coach shall be authorized if: )
While it may be possible, I can't think of a single occasion where a hub turn followed by a few hours of sleep at the hotel followed by a DH home didn't exceed 11:30. And there's very few occasions where a FC ticket wouldn't have been authorized on a single departure back end DH for me either.