Upper Limits of 1 of a suit opening bids

1D:          Upper Limit  is decided only when:
1HS:       Upper limit is decided when:
1C:         Upper limit as follows: (Lower limit 12 HCP)
The Major openings have a slightly lower opening bid value of 10+ however it is more likely to have a lower upper  limit due to our 2Ma 4-5LTC openings. 1Ma opening becomes less frequent with 16+ HCP.