I am in India…I have approved H1B from current company A which starts from Oct 1st 2013…I am planning to transfer to compnay B and travel for them…company B will apply in premium processing…after my transfer is successful I will resing from compnay A and serve their 2 months of notice and only then travel and join company B…therefore in best case scenario I will be in US for company B in first week of Jan… now my question is when company B applies for cap exempt petition for transfer can they mention my start date as 1st Jan 2014 so that my visa petition gets a start date of Jan 1st 2014? or the start date will be automatically the the day my petition gets approved i.e. say 15th Oct 2013? the reason I am asking this question is, if my petition starts from 15th Oct and I travel in Jan after serving my notice period I unnecessarily lose 2.5 months of my work authorization…I understand that I can claim those 2.5 months in extension petition later but I just wanted to know the rule/process