No it wouldn't. Earnings per unit are calculated after interest costs so would not have the same effect on interest cover ratio.
At the extreme, a 30% fall in revenues would reduce net income (after interest) by a bit more than half. If I have $11K revenue to cover $5K in interest (2.2 x IC).
Doing the sums on the Half yearly, a 30% fall in revenue would still allow an interest coverage of 1.45 x.
Thankfully, a 30% fall is unlikely in the next year as most rents are locked in. Over the next 3-5 years its a possibility (although the grape/vineyard oversupply may have dissipated so IMO a 30% fall is not likely). Even still, by then loans outstanding would have reduced. Worst case, a small capital raising would ensure the covenants were maintained. At current prices, this likelihood seems priced in, but I could be wrong.
CWT Price at posting:
28.0¢ Sentiment: LT Buy Disclosure: Held