all the other co-accused, if there are more than one co-accused other than the accused, examining himself as a witness, have a right to cross-examine that accused, on a matter of right

all the other co-accused have a right to cross-examine that accused if the accused examining himself deposing something against one of the co-accused

the co-accused do not have any right at all to cross-examine, the accused examining himself as a witness under any circumstances.