diff --git a/plugin.lua b/plugin.lua
index ea93638..358f993 100644
--- a/plugin.lua
+++ b/plugin.lua
@@ -263,6 +263,7 @@ function set_rds_udg(xy, groups) end
 function set_rds_udg2(xy, groups) end
 
 ---Registers an ODA to be used in the O of the group sequence. ODAs are stored as state data, thus running reset_rds will clear it
+---Groups 14, 15, 2, 0 cannot be registered either version, groups 10, 4, 3, 1 can be only registered as B
 ---@param group integer
 ---@param group_version boolean
 ---@param id integer
@@ -276,6 +277,7 @@ function register_oda(group, group_version, id, id_data) end
 ---Sets a function to handle the ODA data generation. 
 ---The handler is called when the group sequence 'K' slot is processed.
 ---The function must return 3 integers representing RDS Blocks B, C, and D.
+---Please note that you do not need to compute the block A to indentify the group and group version, that will be done for you and EVERY SINGLE group has PTY and TP inserted (and also PI if its a B)
 ---@param oda_id integer The ID returned by register_oda
 ---@param fun ODAHandler
 function set_oda_handler(oda_id, fun) end
\ No newline at end of file
diff --git a/src/lua_rds.c b/src/lua_rds.c
index d700eff..c0dd252 100644
--- a/src/lua_rds.c
+++ b/src/lua_rds.c
@@ -421,7 +421,19 @@ int lua_register_oda(lua_State *localL) {
 	if(mod->enc->state[mod->enc->program].user_oda.oda_len >= 32) return luaL_error(localL, "There can't be more than 32 registered ODAs");
 	if(mod->enc->state[mod->enc->program].user_oda.odas[id].group != 0) return luaL_error(localL, "internal error");
     mod->enc->state[mod->enc->program].user_oda.odas[id].group = luaL_checkinteger(localL, 1);
-    if(mod->enc->state[mod->enc->program].user_oda.odas[id].group == 0) return luaL_error(localL, "Invalid group");
+    switch (mod->enc->state[mod->enc->program].user_oda.odas[id].group) {
+    case 14:
+    case 15:
+    case 2:
+    case 0: return luaL_error(localL, "Invalid group");
+    case 10:
+    case 4:
+    case 3:
+    case 1:
+    default:
+        if(mod->enc->state[mod->enc->program].user_oda.odas[id].group_version == 0) return luaL_error(localL, "Invalid group");
+        break;
+    }
     mod->enc->state[mod->enc->program].user_oda.odas[id].group_version = lua_toboolean(localL, 2);
     mod->enc->state[mod->enc->program].user_oda.odas[id].id = luaL_checkinteger(localL, 3);
     mod->enc->state[mod->enc->program].user_oda.odas[id].id_data = luaL_checkinteger(localL, 4);