He performs tayammum, and it is not required for him to perform wudu initially. However, if he is in a state of major impurity that necessitates wudu, then he must perform both wudu and tayammum. Refer to: Al-Bahr Al-Ra'iq 1: 160, Al-Radd Al-Muhtar 1: 170, Sharh Al-Wiqayah p. 110, Al-Hadiyyah Al-Alaiyyah p. 38, and Sharh Al-Ziyadat vol. 3/a.