permission
“All rights reserved. You do not have permission to copy or modify this work”
“You need author’s permission to use this work”
“You do not have permission to access this information”
/used:/
Usage of this word often suggests that author’s consent is always necessary to use a work. In fact flexibilities in copyright law allow for a wide range of uses, thus limiting the author’s monopoly
/recommendations:/
Point out that users have certain rights to use works without any permission of the author, as it is a statutory limitation to the monopoly
Use it instead of the word “buying” in the context of online services that only offer you to pay for a permission to access a file instead of a copy of a work