IRC 802.7 Structural roof members (rafters) shall not be cut etc., etc.,
IRC 804.3.7 Rafters .... shall not be spliced. When I see it, its referred to a PE.
I have, however, seen the splice in Thoms pic, prescribed and documented, by a PE. I would not take it upon myself to recommend that fix nor assume that the same one in another setting would be the correct one.