A. It is not permissible to pass a Meeqaat point without Ihraam. (Badaai'us Sanaai' V2 P164).
If a person does enter Makkah without Ihraam, he should go back to a Meeqaat point, tie Ihraam and recite the Talbiyah. If he does not go back but ties Ihraam in Makkah and commences Tawaaf, a Dum will be compulsory on him. (Al Mabsoot Sarakhsi V4 P304).
The Dum is the sacrifice of a sheep or goat or seventh part of a camel or cow to be sacrificed within the Haram area.
Allah Ta'aala knows best.
Moulana Yusuf Laher
Checked by: Mufti Siraj Desai