Chapter 89 – A Base for Things Forbidden
89.1) If you place a permitted article on a forbidden one, you may not use or touch either the base or the permitted article on the Sabbath.
89.2) If you place two items on a forbidden base, you may be able to touch the one of most value. (See source for details, or consult a rabbi.)
89.3) If you have coins sewn in your pockets, you may touch the garment on the Sabbath.
89.4) A vessel is not considered a base unless the article that is forbidden is put on it in the twilight on Friday.
89.5) A vessel is not considered a base if an article is left on it inadvertently.
89.6 ) You do not render another’s vessel a base by placing a forbidden article upon it.