You have to look at the K-1 to determine taxable income.
If it is in a taxable account, then you pay your current tax rate on it.
(If you are above $250K(I think) there is an additional 3.8% tax so illegals can have free medical care)).
If held is a taxable account the MLP distributions will lower your basis and any income tax will be deferred until you sell . You may have some other taxable income on the K-1 that may be taxable each year.
The tax on dividends is either 15 or 20%, depending on your level of income. HOWEVER the payments made by LINE are not divdends, but distributions, and the amount of taxable income is disclosed in the annual K-1. Your income could be ordinary income, capital gains, interest and return of capital. Also, under ABOMACARE. there is an additional tax of 3.8% on all investment income on income above certain levels. All of the foregoing are effective for the tax year 2013.