Like the NCCA    the  IICRC   is also a well established organisation so you might consider them !
 I still have my opinions regarding Tacca, and still undecided as to the benefits it could  bring .
 and one of my opinions is I some times cannot believe the questions asked on the tacca page, Yes I know we have to learn and its always reassuring to get an answer if you are not sure, but I do think sometimes, simple ,basic questions I see asked by participant's  make me wonder, What!!     
Are these asked by newbies? Not  the majority of questions , Are these asked by members of Tacca?   I don't know, but I,m guessing most must be , so where is the criteria that it takes to be a member?  
Before I get slated, these are just my opinions, and a point to remember
  "The difference between association and alliance is that association is the act of associating while alliance is (uncountable) the          state of being allied. "
  Geoff.