Nature of property to decide partition

dear sir one of my clients father has got agrucultural land properties from his mother,s mother .now a suit for partition was filed by my client's sister .can the property be termed as self acquired or separate property of my client's father as the properties have not from fathers side .in view of uttam singh judgement of supreme court which defined what is ancestral property.? is section 6 of hindu sucession amendment act 2005 applicable to cliam benefit by my client's sister? or section 8 of said act applicable treating the propeties as self acquired or separate property? what is impact if already my client sister has received certain land from her father as settlement in her marrage and sold the same to third parties and intends to file new suit after 25 years of her marrage?