I thought I understood the comment in the file structure,

**                           one (char [4])                    total correction after above

**           tzh_ttisstdcnt (char)s                     indexed by type; if TRUE, transition

**                                                                           time is standard time, if FALSE,

**                                                                           transition time is wall clock time

**                                                                           if absent, transition times are

**                                                                           assumed to be wall clock time

**           tzh_ttisgmtcnt (char)s                   indexed by type; if TRUE, transition

**                                                                           time is UTC, if FALSE,

**                                                                           transition time is local time

**                                                                           if absent, transition times are

**                                                                           assumed to be local time

but, I don’t see them being used the logic to search ats, or to adjust the ats values after loading.  So if present in the data file they do nothing.  In fact, I got rid of the TRUE’s in one of the data files, and it did not make the program produce any different results.

What am I missing?