Because if 'ya' read the note in your reference, 'ya' will see that:
If your airman certificate or special purpose pilot authorization was or will be issued on the basis of on a foreign license you must first apply for a verification of the authenticity of your foreign license. You may visit our website for more information and to obtain the verification form. Your foreign license must first be verified with the CAA prior to making application with the IFO or FSDO to replace your paper pilot certificate or to apply for an airman certificate or rating.
