ยง  489-gg.  Ratio.  The  commissioner  shall  compute  to  the nearest
  thousandth of one percent a ratio for each railroad company by  dividing
  its  average railway expenses by its average railway revenues; provided,
  however, that if a railroad company shall have operated  for  less  than
  one  full  year  prior to the first day of the year in which a tentative
  determination of a railroad ceiling for that railroad company  is  made,
  then the ratio for that ceiling of that railroad company shall be one.
Structure New York Laws
Title 2-B - Railroad Real Property of Interstate Railroad Companies
489-AA - Legislative Declaration.
489-CC - Assessment of Real Property of Railroads.
489-DD - Exemption of Railroad Real Property From Taxation.
489-FF - Average Railway Revenues and Expenses.
489-II - Local Reproduction Cost.
489-JJ - State Equalization Rate.
489-KK - Tentative Determination of Railroad Ceiling; Notice, Complaints and Hearing.
489-LL - Final Determination of Railroad Ceiling; Certificate.
489-MM - Application of Railroad Ceiling; Computation of Exemption.
489-NN - Reports to State Board.
489-OO - Inspection of Accounts and Property of Railroad Companies.
489-PP - Estimated Railroad Ceiling.
489-QQ - Determination of Railroad Ceilings for Certain Railroads in Transition.