Section 57
SEC. 57. When assessment may be increased or reduced.&mdashThe City Assessor shall, during the first fifteen days of December of each year, add to his list of taxable real estate in the city the value of the improvements placed upon such property during the preceding year, and any property which is taxable and which has therefore escaped taxation. He may, during the same period, revise and correct the assessed value of any or all parcels of real estate in the city which are not assessed at their true money value, by reducing or increasing the existing assessments as the case may be. He shall give notice by publication for ten days prior to December first in one newspaper of general circulation published in the city, that he will be present in his office for that purpose on said days, and he shall further notify in writing each person the amount of whose tax will be changed by such action or such proposed change by delivering or mailing such notification to such person or his authorized agent at the fast known address of such owner or agent in the Philippines sometime in the month of November.