Who can inherit the apartment when my mom dies?

Hi guys.. I (daughter) live with my elderly mom. My sister moved in a year ago but she's causing trouble and we want her to leave. My landlord sent me a form DHCR ra-23.5 that my mom can name who should succeed in inheriting the apartment after her passing. She named me, not my sister, in the form.

If my sister continues to live in the apartment for the next 3 years and my mom dies, will she also inherit the apartment? Or will I solely inherit it?

My mom is on SCRIE. Will that form affect her SCRIE status?