Generally speaking, all spices are allowed on SCD. However, spice combinations are not allowed because there may be unallowable drying agents or processing agents (and these may not be labeled).
The solution is simple - make your own. For example, while commercially prepared Italian seasoning is not allowed, all of its components are allowed. For your recipe, add marjoram, thyme, rosemary, sage, basil and oregano, etc. individually.
The same is true for commercially prepared Curry Powder which is not allowed. Make your own curry powder. Use the components: coriander, tumeric, cumin, pepper, bay leaves, nutmeg, ginger, etc.