The FIA haven't helped this because they haven't outright said ''don't do that'' or ''stop doing that''. They just added their second sensor and that was that. With the floors they told teams earlier in the year to change it and gave them a honeymoon period during which they could continue using the ''illegal'' floors while designing more compliant ones. Haas didn't change and they got nicked.
Personally, I think its the infamous ''grey area''. F1 teams have mastered the art of exploiting these with the FIA altering the rules as the grey areas are uncovered.