Joseph Benson's Commentary of the Old and New Testaments - Ezekiel 43:12
Ezekiel 43:12. This is the law of the house This is the first comprehensive rule; or, this is the general law respecting this temple, and all that belongs to it. Whereas formerly only the chancel, or sanctuary, was most holy, now the whole mount of the house, the whole limit thereof round about, including all the courts and all the chambers, shall be so. This signified that, in gospel times, 1st, The church should have the privilege of the holy of holies, namely, that of a near access... read more
Albert Barnes' Notes on the Whole Bible - Ezekiel 43:12
See also Ezekiel 47:12. This is the law of the ordinance of the new sanctuary. After the consecration, God pronounces the “law” which is to govern the ordinances of the sanctuary (compare 1 Kings 8:0), first briefly repeating the general rule that the place must be kept holy to the Lord (compare Revelation 21:27), and then proceeding to specific ordinances commencing with the altar. read more