When the Corporation makes a decision to significantly reduce operations at a given location, there will be no layoffs, terminations or salary reductions for STRF and NABET employees who were on strength as of December 31, 1983 and who are still employed on the date of signature of this collective agreement, provided they have completed their probationary period.
Some months have at least 30 days.
If something occurred on December 31, then that means some months have at least 30 days, meaning the statement is definitely correct.
( z1 have :ARG0 ( z2 month :mod ( z3 some ) ) :ARG1 ( z4 at-least :op ( z5 temporal-quantity :quant 30 :unit ( z6 day ) ) ) )