Thanks, it is clear to me now. My confusion in my case was as below.
1. I have a CRS score of 434 which contains 15 sibling points also. I got an ITA on 9th Aug, 2017 draw where cut off was 433.
2. I had also applied for OINP on 29th July, 2017 whereby my application is in DIP stage since 21 Aug, 2017.
3. I have neither declined ITA nor withdrawn OINP application so far.
4. I wish to decline this ITA of 9th August only when I receive the OINP nomination. My apprehension was that by the time I get nominated all the total quota of 71700 for this year would have been expired by then.
5. My reason for not availing this ITA is that I still have doubt on the legality of my obtaining the 15 sibling points which I had obtained by updating the profile earlier before the draw but after the date of creation of my EE profile. However the seniors here on this forum after knowing my facts had advised me that my obtaining sibling points was OK.
6. Now, when I know that the draws will continue till December, I am expecting that OINP will send me a Procedural Fairness letter asking me to decline ITA before being nominated. I do not want to take any risk however small it may be.
7. Kindly advise me if you feel there is any risk involved in my decision of taking the OINP route by declining the ITA.
Thanks once again for your help in making my decision.