Can a non ca employed by a ca firm have a poa for tax hearin

Dear All,

Had a few doubts regarding POA (Power of Attorney) wrt Income Tax hearings.

1. Can a Semi Qualified (having completed Articleship) employed by a CA Firm obtain a POA and represent client in I.Tax hearings or is it only CA's of a CA Firm can represent in IT Hearings.

2. A POA has got the firm's name mentioned with a Partner's Authorise signature. Does it mean only the Authorised signatory can represent or anybody from the Firm can represent.

Regards

Mohit