if not PO9 return False
if Word[30:31] == 0b00 return False
if Word[33:37] != 0b10001 return False
+ # if Word[33:37] != XXXXX return False # 50-bit
return True
```
return True
```
+EXT000-063:
+
+```
+ if PO1 return False # or other reserved
+ if not PO9 return False
+ if Word[30:31] = 0b00 return False
+ if Word[31] = 0b0 return False
+ if Word[30:31] = 0b01 and
+ Word[6:29 ] = 0x000000 return False
+ return True
+```
+
+