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Migration of students from SOL to Regular Colleges and vice-versa is allowed provided that the student meets the requirements laid down by the University. Inter-university migration is also allowed subject to the condition that the student meets the laid down stipulations. Major conditions in this regard are outlined hereinafter. For more details for their particular case students may seek guidance from the School.
Migration from a Regular college to the School of Open Learning and vice-versa with change of course is not permissible. However, migration to II year and III year would be allowed in the same course and same subject.
Migration to the School of Open Learning from regular college is not permitted beyond 15 days from the date of issue of No Objection Certificate by the Executive Director, School of Open Learning.
Candidates seeking migration/ transfer from Regular Colleges of Delhi University to School of Open Learning will be allowed to join B.A. (Programme)/B.Com./ B.Com.(Hons.)/B.A. (Hons.) Programme, English/ B.A. (Hons.) Programme, political. Science II year. and III year. as the case may be only if the Span Period permits, and subject to eligibility.
Migration / Direct Admission to II / III Year
Migration to 2nd and 3rd year of Honours and 3rd year of Programme courses from other Universities is not permissible.
Admissions to 2nd and 3rd year of B.Com. (Hons) will be permitted only for Delhi University students on the basis of individual merit within the pendency of 5 years from the date of his/her admission to the course in the University.
It is the basic responsibility of the student seeking migration or direct admission to submit the required certificates and documents in support of the eligibility, as and when demanded.
Candidates who have passed the Matriculation or the S.S.L.C., S.S.C. or Higher Secondary (11 year schooling) examination only, are not eligible for admission.
Migration from School of Open Learning to Non-Collegiate Women's Education Board and vice-versa is not allowed.
The student who wishes to migrate in the SOL must be a bonafide student of the college at the time of leaving the college.
The Ex. Student of II & III year of the college with same subject and same course within the pendency of the Span Period would come under the category of Direct Admission.

Hi Vaishali,
You are going from science to commerce.
Initially, it might take you some time to understand the basics of commerce, but you'll be fine.
Regular college or not, should completely be your decision.
Anyways once you clear your cpt and proceed ahead with CA course, you have to have your training which might clash from your college.
Plus your CA exams might also clash from your college exams, depending on the college where you get admitted.
However, if the doubt in your mind about joining a regular college or not has creeped up due to your decision of going with CA then it's baseless.
You can easily cope up with both graduation and CA together.
Further to inform you, it is suggested that you go for B.Com only. See if you get B.Com honours then its good else regular B.Com is also fine since you have that CA tag alongside.
Also, just for you to think, if at all you wanna go for correspondence graduation, I would suggest have a look at the ignou collaboration with ICAI wherein you have to give less papers to get your B.Com honors degree.
Think wisely, decide accordingly.
All the best.
Feel free to revert in case of doubts.