<prompt> Translate the following text to EnglishKama ushindani ni kuruhusiwa na washindani kutokea, inaweza kuwa kwamba mfumo wa mabadiliko ya anwani inaweza kuendeshwa na chombo tofauti na kufanywa inapatikana kwa washindani wote.  <response>: 25 If competition was allowed and competitors arose, it might be that a change-of-address system could be operated by a separate entity and made available to all competitors. 