diff --git a/bsip-0040.md b/bsip-0040.md
index 24e2516..fd7df57 100644
--- a/bsip-0040.md
+++ b/bsip-0040.md
@@ -47,7 +47,7 @@ All descriptions in this section are on a pseudo/prosa level and no recommendati
 
 ### Custom active permission and custom active authority
 
-A `custom_active_permission` looks like follows (in JSON/pseudo for clarification):
+A `custom_active_permission` looks like follows (in JSON-like/pseudo for clarification):
 ```
 custom_active_permission = list of custom_active_authority items
 custom_active_authority = {
@@ -94,15 +94,17 @@ Stateless assert, all argument types. `Argument value` must be equal to one of v
 Stateless assert, all argument types. `Argument value` must NOT be equal to any of the values in the list.
 
 #### `lt, le, gt, ge`
-Stateless assert, applies to `int` and `string` type arguments. If argument is `string` type, use its length as `argument value`. 
+Stateless assert. Allows explicit type converstion:
+- `int` type: use as is
+- `string` type: user `length` as `argument value`
+- `price` struct `{base = {amount, asset_id}, quote = {amount, asset_id}}`: convert to float price  `argument value = base.amount/quote.amount`
+
+The different asserts read as:
 - `lt`: `Argument value` must be less than `comparative`
 - `le`: `Argument value` must be less than or equal to `comparative`
 - `gt`: `Argument value` must be greater than `comparative`
 - `ge`: `Argument value` must be greater than or equal to `comparative`
 
-#### `length`
-Stateless assert, only `string` type arguments. Length of string (or encrypted string in case of memo) must be within `min` and `max`, inclusive. One of the bounds can be empty to indicate unlimited.
-
 #### `limit`
 Statefull assert, only `int` type arguments. When the authority is created, `interval_began` is set to `valid_from` from its custom active authority and `max_cumsum` to `0`. Incoming operations are first tried to match all stateless asserts, 
 and if all passes continue with statefull asserts. If `now > interval_began + interval_in_sec`, then set `max_cumsum = 0` and set `interval_began = now`.