Dear friends, if I use tobit for dependent variable, Y, with lots of zero or negative values, can I use the log of Y in the command as below,

Code:
// model 1

ivregress 2sls logy x1 (x2 = x3 x4) [aw = weight], vce(cluster var1) 

// model 2

ivtobit logy x1 (x2 = x3 x4), ll(0) twostep
How could I apply [aw] and clustering in tobit regression? Thank you.