Styles
Classifications
| Ruby (Wood) |
Ruby / Crusted Port / Late Bottled Vintage
Port (LBV) / Vintage Character Port (Super or Premium Ruby) |
| Tawny (Wood) |
Tawny / Aged Tawny / Colheita Tawny |
| White (Wood) |
White Port |
| Vintage Port |
Vintage Port / Single-Quinta
Vintage Port |
Monitored
by Instituto do Vinho do Porto. Points awarded based on Criteria
| Criteria |
Points |
| Production |
120 |
| Soil |
190 |
| Gradient |
100 |
| Altitude |
150 |
| Geographical Position |
600 |
| Position in relation to climatic conditions |
210 |
| Maintenance and upkeep |
100 |
| Grape quality |
150 |
| Age of vines |
70 |
A
total of 1,680 points (140 per sub-category) can be awarded to a vineyard
which classifies the vineyard and permits it to make so many liters of port
per 1,000 vines:
| Grade |
Points |
Liters per 1,000 vines |
| A |
1,200 plus |
700 |
| B |
1,001 to 1,199 |
700 |
| C |
801 to 1000 |
500 |
| D |
601 to 800 |
400 |
| E |
401 to 600 |
300 |
| F |
0 to 400 |
0 |
