All those items instantly doubled in price.
And it was not really announced in any good way - the main distribution method was word-of-mouth.
On the back of our new triangle (we had one already) is the text of the government act about needing triangles. I was amused at that - why tell the owners of a new triangle that the government requires it? (The text is not displayed on a shelf at a store or something where people could actually be persuaded by it.)