I'm here to ask you about a formal sentence. It is something like an order which has been sanctioned at a previous time and to be considered effective from past and it's about to be written now. My best guess is "This order is to be considered in effect from August 01, 2013."
tnx in advance
Welcome to the forums,Md. Mahfuzur Rahman.
In future posts please use standard English throughout without resorting to chatspeak or texting abbreviations.
I have changed your title lest other students think 'plz help' is acceptable to us.