There is no such power known as "legal rubber stamp" authority.
the stamp act of 1765 placed tax on things such as legal documents, playing cards, and dice
If they are witnessed by the apropriate people.
Yes
Yes
The stamp act taxed wills, diplomas, and marriage license. It taxed newspapers, almanacs, playing cards, and dice too.
The British taxed marriage papers, diplomas, and wills.
The Stamp Act
Stamps... The Stamp Act
If your like history, here's a great online article about the invention of the rubber stamp.
You can create a personalized rubber stamp with your business logo on it using the 'Stamp design Wizard'. Customize one for your company at RubberStamps.com.
Rubber stamp crafts are popular because they are easy to learn and use, inexpensive and versatile. Artists at all levels can create crafts using rubber stamp techniques.