Is it possible to limit user to use ""SPECIFIC Peope" to share the edit permission ?

[WilliamCheng_N]

I just want USER only can share the VIEW permission to others ?

And I found they are possible to share the edit permission  via specific people . 

[#2]

Is is strange . Wen I enable the "Request Check Out" in Version Setting , I found the checked box for allowing edit is grayed(can't check!)

I don't know why and maybe this will be my short-term solution .....