There are no export controls per se on the one-time pad - however, there could easily be controls on elements of the implementation of the one-time pad. For example, if the one-time pad is sent using encryption that is subject to export controls, the implementation would be subject to export controls because of that.

A one-time pad is an encryption/deencryption method where a random series of cipher codes is used one time, and one time only, in a communication. Assuming that only the two parties possess their pairs of pads, then the encryption is unbreakable.

One Time pad

The pad can charge as many batteries as it is destined to charge. Most pads charge about 4 batteries at a time.

There are several times when it may be time to change the dining table pad. One may have a big spill that ruins the pad or it may get burned by a very hot pan.