The table below shows the special conditions implemented in equiv, together with the codes to be supplied with the COND card (see the Keywords section). The symbol Q means that the hkl indexes are permutable.
| Special condition | Code |
| h+k+l = 2n | 1 |
| h or k or l = 4n | 2 |
| h or k or l = 2n | 3 |
| 0kl: k, l =2n Q | 4 |
| hhl: 2h+l = 4n Q | 5 |
| h00: h=4n Q | 6 |
| -h+k+l = 3n | 7 |
| 00l: l= 6n | 8 |
| 0kl, hhl: l= 2n, h+l=3n | 9 |
| hk0: h+k = 2n | 10 |
| 0kl: k+l = 2n | 11 |
| hhl: l = 2n | 12 |
| 00l: l= 2n | 13 |
| h00: h = 2n | 14 |
| h+k = 2n | 15 |
| h0l: h = 2n | 16 |
| h0l: l = 2n | 17 |
| 0k0: k = 2n | 18 |
| h+k, h+l, k+l even | 19 |
| hhl: l = 2n | 20 |