In short, once this new ruling becomes effective on April 1, 2017, the size/strength of the backing will be inconsequential, and will therefore no longer be restricted to 60kg (130lb). In other words, there are no limits to the strength of the backing under the new rule. That said, the highest line class recognized by the IGFA will still be 60kg (130lb), however it will only be the section of line immediately following the double line, leader, or hook that will be tested in order to determine where the catch will be classified. And if that section of line exceeds the 60kg (130lb) limit, the catch will be not be legal by IGFA rules.