S ECTION 1870 . Official Standards for Certain Other Fibers . — When the condition of the fiber trade renders such course expedient, the Director of Agriculture may likewise fix standard grades for abacá which may have been partially cleaned or prepared in th e form of tow, waste, or strings. He may also establish standards for the fiber of any species of Musa  other than abacá for which there shall be a demand in the market. 

[2380-2 (f) .] 

SECTION 1871 . Preservation of Official Standards . — The originals of all official standards shall be prepared in suitable form and shall be securely kept in the Bureau of Agriculture, being subject to renewal in the discretion of the Director of Agricultur e, but without variation of the standards, as occasion may require. 

[2380-2 ( d ).] 

SECTION 1872 . Supply of Secondary Standards for Uses of Trade . — Specimens of the different grades of fibers conforming to the original official standards shall be prepared by the fiber division of the Bureau of Agriculture, and after certification by the Director of Agriculture shall, upon request, be supplied, as secondary official standards, to all authorized grading establishments, provincial governments, chambers of commerce, planters' associations, and other persons or institutions directly interested i n the trade, the actual cost of such specimens to be paid in advance by the party requesting the same. TCaADS 

Secondary standards prepared by the Bureau of Agriculture, as well as authorized sets prepared by grading establishments and duly certified, shall be deemed to be official standards for all purposes. 

[2380-2 ( b ).] 

S ECTION 1873 . Renewal of Secondary Standards by Grading Establishment . — Grading establishments may, solely for their own use, prepare duplicates of secondary official standards kept by them; but it shall be unlawful for any person to use such duplicate bef ore it shall have been approved and certified by the Director of Agriculture or his authorized agent. 

[2380-2 ( e ).] 

SECTION 1874 . Classes of Grading Establishments . — There shall be six classes of grading establishments which shall be classified (according to the quantity of loose fiber they grade and bale per annum) as follows: First-class 

