Tier 1 Leave to Remain & Entry Clearance differences

[pikeng89]

I obtained my Entry Clearance of Tier 1 Investor outside the UK and landed on 15th Jun 2013.

With a stamp at airport, the 'Specific Date' in my case is also 15/06/2013. I have invested sufficient funds within 3 months from that 'Specific Date' and wondering if I am eligible to apply the extension (2 years) of my Investor visa now? Or, the 3 years which is required by UKBA starts at the date I actually invested? The visa gives me 3 years and 4 months and it's long enough to make me confused

[Obie]

What was the length of your entry clearance?

The period starts from the grant of leave, but for an extension, you must invest within 3 months of arrival as a Tier 1 investor, and provide evidence of having done so, within that time frame.