they write their own tickets

问题描述:

they write their own tickets

他们自己选择

eg:They allowed the scientists to write their own ticket for the kind of research setup they want.
他们让科学家自选所需研究设备。

他们写自己的票

供参考
write sb's own ticket
意思是自行决定对某事的条件(款)
they write their own tickets
可以理解为
他们(对某事的条款)自行决定(拿主意)