you don't, but you should get permission in order to avoid getting sued. you might also get your facts all messed up if you don't. overall, it is just safer for everyone involved.
i don't know i need it 2 ! =( someone knows?
They didn't need anything. They were free men.
No. A slave is owned by someone else. That is what makes them a slave and they are not paid for their labor. The Supreme Court decided they were property and had no rights. Slaves had to have permission to leave the plantation and didn't need money.
If you want to put someone in charge, then they need to be able to do their job unhindered. Saying "you can do whatever you like as much as you want, no limits. Except you need permission from this person and only after these other people have agreed to let you first" is slighty absurd.
They didn't need to really worry about this because they didn't know how to write.
no
You do indeed need permission to write an adapted screenplay. This is to make sure you are following the copy rights.
no permission required for that
yes
I know that if you use someone else's lyrics, you need their permission unless you're analyzing them. Yes, to use the poem as lyrics, or in any way, requires permission of the copyright holder.
No
No. Otherwise photographers would need permission for almost every photo they take.
Why would you need to give someone written permission to drive? You would first have to add the person to your insurance as a driver. Giving them written permission doesn't change this requirement.
If you are altering someone else's image, you need their permission.
If the video is sexual, it is illegal no matter what. Otherwise, there are no laws stating permission.
I need permission to copy when I'm at school.
i don't know i need it 2 ! =( someone knows?