Income tax law

I agree with the letter published on 17th April, 2008 entitled, “Income tax law” written by SMS Zaman, Member(retd), Taxes Administration, National Board of Revenue, Dhaka. I am a law student of 1st year and I don't know much about income tax laws.
Mr. Zaman's opinion is that frequent amendments to the Act are not desirable. I think the point is valid. So, I agree with him that before enacting the income tax laws, public opinion must be sought on some specific points.