Right. The case of abbytang applied to contracts signed before 9/7/04. For contracts signed after that date (the new regulation passed), all deals depends on what has been agreed on contract, which is more fair to the landlord.
You better double check with yr lawyer, as I believe what you quoted before that "新租管條例下,業主要係一年前通知個租客" is not applicable to contracts signed after 9/7/04.