When the assessment rolls have been completed in cities of the 1st class, they shall be delivered to the commissioner of assessments, in all other cities to the city clerk, in villages to the village clerk and in towns to the town clerk. At least 15 days before the first day on which the assessment rolls are open for examination, these officials shall have published a class 1 notice if applicable, or posted notice, under ch. 985, in anticipation of the roll delivery as provided in s. 70.50, that on certain days, therein named, the assessment rolls will be open for examination by the taxable inhabitants, which notice may assign a day or days for each ward, where there are separate assessment rolls for wards, for the inspection of rolls. The assessor shall be present for at least 2 hours while the assessment roll is open for inspection. Instructional material under s. 73.03 (54) shall be available at the meeting. On examination the commissioner of assessments, assessor or assessors may make changes that are necessary to perfect the assessment roll or rolls, and after the corrections are made the roll or rolls shall be submitted by the commissioner of assessments or clerk of the municipality to the board of review.