How to say there are cases where this rule doesn't hold good. in Japanese
1)
このこの(kono) (n) this規則規則(kisoku) (n) rules/regulations/conventionsがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/and当て当て(ate) (n) aim/object/purpose/end/expectations/prospects/hopes/something that can be relied upon/snack served with alcoholic drink/pad/guard/blow/strike/ perは(int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sighまら(n) obstacle to buddhist practice/ penisないない(nai) (aux-adj) not/emphatic suffix場合場合(baai) (n-adv,n) case/situationがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/andあるある(aru) (adj-pn) a certain .../some ...。。(。) Japanese period "."
