of the other groups of  not less than five pesos, as forestry charges, in the discretion of the Director of Forestry and after agreement with the same, with the approval of the Secretary of the Interior. These agreements shall be for one year, but shall be subject to renewal. The volume of squared timber shall be ascertained by multiplying the average of the cross section measured by the length, to which twenty-five per centum shall be added for loss in squaring. The privilege of manifesting timber after squaring shall, however,  be granted only to licensees who have squared their logs in the forest with the tax and intend to take it to the market in this form. If sawn or otherwise manufactured timber is found which has not been manifested in accordance with the provisions hereof, the corresponding forest charges will be assessed on twice the volume of the actual contents of such sawn or manufactured timber. [2339-85; 2451-1.] S ECTION  1666 . Charges for Timber Cut in Public Forests . — Except as otherwise specially provided, the following charges shall be made for each cubic meter of timber cut in any public forest or forest reserve in the Philippine Islands whether removed theref rom or not: ( a ) On timber in the first group not including ebony and camagon stripped of sapwood, two pesos and fifty centavos. EHASaD ( b ) On ebony stripped of sapwood, six pesos. ( c ) On camagon stripped of sapwood, four pesos and fifty centavos. ( d ) On timber in the second group, one peso and fifty centavos. ( e ) On timber in the third group, not including firewood, one peso. (f) On timber in the fourth group, not including firewood, fifty centavos. [2339-86.] S ECTION  1667 . Charges for Firewood Cut in Public Forests . — For firewood cut in public forests and forest reserves the following charges shall be made. For bacauan and tangal, per cubic meter, twenty centavos. For other woods, per cubic meter, ten centavos. 503 Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011