Can i add the "Give 'Other' Explanation "(OTH-100) source to any source type

Summary

Can i add the "Give 'Other' Explanation "(OTH-100) source to any source type

Content

Hi All,

           I want to display the Other Explanation textbox for few source types. Looks like this textbox will appear only for Source code - OTH-100 (Source Name - Give 'Other' Explanation). Currently, only the "Other" source type contains the OTH-100 source. I want to add this to other source type like - "Professional Associations".

Is there a way i can add this source to other source types(Ex. "Professional Associations")  , so that when i select that source type and the OTH-100 source , i get this explanation box.