D1.1-98 says that retesting can take place immediately if two weldments are performed for the retest or one weldment may be performed after a period of instruction or practice. Somewhere I got the idea that if you failed the retest you would have to wait six months before you could test again but I don't find this in the 98 codebook. Did I get this from a previous version, the 2000 version or did I just dream it up on my own?