[COMPLEX SCENARIO] A technician is asked: 'A 110-lb R-407A commercial refrigeration system (HFC blend, applicable threshold 20%) shows a 19% leak rate in Year 1 (no repair triggered, since 19% < 20%). In Year 2, ANOTHER 19% leak rate is calculated (again below threshold individually). Does the REPEATED near-threshold pattern across multiple years trigger any DIFFERENT regulatory response compared