Yes, it is NDP‑1, which essentially takes up the notion of the 30 consecutive days of work that are necessary to acquire an additional day of leave, which is in addition to the four days initially banked that were provided for in NDP‑2.
These four days don’t exist in NDP‑1, unfortunately—let me make an editorial comment here. NDP‑3 focuses solely on clarifying the 30 consecutive days of work that are necessary to earn one additional day of leave. Therefore, it doesn’t matter whether a person was hired on March 7, March 15 or March 26, it’s the number of days worked that counts, not the date they were hired.