Matters which are not covered by notified standards u/s 145(2) and are also not covered by provisions of income tax law can be interpreted as per non notified standards or guidance notes of ICAI although not mandatory in nature- Held by AP High Court in Pact Securities on 05-02-2015 ITA 252/2003. The Court allowed deduction of lease equalization charges as per Guidance Note issued by ICAI applicable before 01-04-2001