1.  Interest created after effective date.  This chapter applies to any interest that complies with this chapter created after the effective date of this chapter, whether designated as an option to purchase at agricultural value or an equitable servitude, restriction, easement or other interest in the property.  

2.  Option to purchase at agricultural value created before effective date.  This chapter applies to any option to purchase at agricultural value created before the effective date of this chapter if the option to purchase at agricultural value would have been enforceable had it been created after the effective date of this chapter, unless retroactive application contravenes the Constitution of Maine or the United States Constitution.  

3.  Chapter does not invalidate interest.  This chapter does not invalidate any interest, whether designated as an option to purchase at agricultural value or an equitable servitude, restriction, easement or other interest in property, that is otherwise enforceable under other laws of this State.