Minimum for CAAS is something like 3500 hrs and 500 on type, but that's the bare minimum. It happened that Tiger upgraded with minimum hours but most applicants have much more.
Tiger hires all the time, but they give priority to type rated.
Tiger to SIA: There was also this 5 years, like in SLK, but there has been nobody who changed, TGW is only 4 years old. They also say that you cannot change over like that, you first have to quit Tiger, I think they talked about a hiring ban. It's all rather theoretical since nobody ever changed over. I guess if SIA or SIA cargo needs pilots they take them from where they can get, if they match.
Dani