No man has the right to grant exceptions to God’s commands (Num. 9:1-14)
“The sovereign God prescribes ordinances for His people and will not tolerate any corruption of His commands through human addition. Because God's appointed ordinances are typical of Christ, any deviation from them is an implicit denial of His Person, authority, and redemptive work.

In the first five verses of Numbers 9, Moses is instructed to relay to Israel God’s command regarding the particular day in which the Passover was to be kept. Immediately following this is the account of ‘certain men’ who became ceremonially impure by contact with a human corpse and were therefore disqualified from participation in the Passover at its appointed time. Desiring to keep the feast, but recognizing that it would have been a direct transgression of God's command to observe the Passover on a different date, they appealed to Moses.

Once more, the principle is illustrated that God’s commands are not to be set aside or altered, even for what seem to our eyes to be good and justifiable reasons. Remarking on this passage Malcolm Watts observes, ‘even though Moses was Israel’s leader, he did not feel at liberty to authorize any change in the observance of ordinances... [H]e refused to give them permission to participate in the celebration until he had received from God an express statement to that effect.’

Moses, as an instrument of divine revelation, received additional statutes to cover such circumstances. God was progressively revealing His will for worship in the context of real life situations so that His people might learn to implement nothing without a positive warrant from His word.” (Comin 37-38)