Requiring

The assignment was very difficult, requiring hours of tedious work.

Source: tatoeba (1750005)

Ordering from catalogs saves you time and money without requiring you to leave the house.

Source: tatoeba (2057133)

As surgeons keep their instruments and knives always at hand for cases requiring immediate treatment, so shouldst thou have thy thoughts ready to understand things divine and human.

Source: tatoeba (6203116)

If the teacher is to plan out a vacation or something similar requiring one to compare prices and figure out what it would cost, it is the pupils' skills he would exploit. Sometimes, the wife may be wishing for a new fruit bowl, or perhaps the husband is looking for a new letter opener. Many have sons that require a short bedside story or daughters with dolls that must be clad in clothing of utmost fashionability; all this, the teacher makes the pupils make for him.

Source: tatoeba (6442810)