Should rel=publisher tags (pointing out at Google+ Business page) only go on the homepage?

[McTaggart]

Hello, I've just read...

“Publisher tags should only go on the most significant page of your site, usually the homepage.”

Is this correct?

[TheeDigital]

I don't think it hurts to have it on other pages, but as it really only shows for branded searches at the moment, definitely have it on the homepage.

[digitalforerunners]

It has to be on the homepage and most significant pages of your website. it doesn't hurt to have them on other pages is just that they do it in order to link your website with google plus profiles.