diff --git a/specification/hugr.md b/specification/hugr.md
index 4d99bfb21..cb6a5a09f 100644
--- a/specification/hugr.md
+++ b/specification/hugr.md
@@ -1998,7 +1998,6 @@ including `Module`.
 | `LoadConstant` | 0, 1    | +, ✱    | 1, 0    | 0, 0       | 0, 0          | 1, 0        |          |
 | `Input`        | 0, ✱    | 0, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
 | `Output`       | ✱, 0    | ✱, 0    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
-| `LeafOp`       | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
 | `Call`         | ✱, ✱    | ✱, ✱    | 0, 0    | 1, 0       | 0, 0          | 1, 0        |          |
 | `DFG`          | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, +        | DSG      |
 | `CFG`          | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, +        | CSG      |
@@ -2007,6 +2006,12 @@ including `Module`.
 | `TailLoop`     | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, +        | DSG      |
 | `Conditional`  | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, +        | `Case`   |
 | `Case`         | 0, 0    | 0, 0    | 0, 0    | 0, 0       | 0, 0          | 1, +        | DSG      |
+| `CustomOp`       | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
+| `Noop`       | 1, 1    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
+| `MakeTuple`       | ✱, 1    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
+| `UnpackTuple`       | 1, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
+| `Tag`       | 1, 1    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
+| `Lift`       | ✱, ✱    | ✱, ✱    | 0, 0    | 0, 0       | 0, 0          | 1, 0        |          |
 
 ### Appendix 3: Binary `compute_signature`