6.	Borrowings Under Credit Facilities

InfraREIT LP Revolving Credit Facility

In December 2014, InfraREIT LP entered into a $75.0 million revolving credit facility, led by Bank of America, N.A., as administrative agent, with up to $15.0 million available for issuance of letters of credit and a maturity date of December 10, 2019. The revolving credit facility is secured by substantially all of the assets of InfraREIT LP. In addition, Transmission and Distribution Company, LLC (TDC) guarantees the revolving credit facility and this guarantee is secured by the assets of, and InfraREIT LP’s equity interests in, TDC on materially the same basis as with TDC’s senior secured notes described below. Upon consummation of the IPO and Merger, InfraREIT, Inc. became a guarantor under this revolving credit facility.

The credit agreement requires InfraREIT LP to comply with coverage ratios on a consolidated basis and contains affirmative and negative covenants, including: limitations on additional debt, liens, investments, mergers, acquisitions, dispositions or entry into any line of business other than the business of the transmission and distribution of electric power and the provision of ancillary services and certain restrictions on the payment of dividends. The credit agreement also contains restrictions on the amount of Sharyland’s indebtedness and other restrictions on, and covenants applicable to, Sharyland.

Borrowings and other extensions of credit under the revolving credit facility bear interest, at InfraREIT LP’s election, at a rate equal to (1) the one, two, three or six month London Interbank Offered Rate (LIBOR) plus 2.5%, or (2) a base rate (equal to the highest of (a) the Federal Funds Rate plus ½ of 1%, (b) the Bank of America prime rate and (c) LIBOR plus 1%) plus 1.5%. Letters of credit are subject to a letter of credit fee equal to the daily amount available to be drawn multiplied by 2.5%. InfraREIT LP is also required to pay a commitment fee and other customary fees under the revolving credit facility. InfraREIT LP may prepay amounts outstanding under the revolving credit facility in whole or in part without premium or penalty.

At March 31, 2016 and December 31, 2015, there were no outstanding borrowings or letters of credit and there was $75.0 million of borrowing capacity available under the revolving credit facility. As of March 31, 2016 and December 31, 2015, InfraREIT LP was in compliance with all covenants under the credit agreement.

SDTS Revolving Credit Facility

SDTS’s revolving credit facility has a borrowing capacity of up to $250.0 million and a maturity date of December 10, 2019. Up to $25.0 million of the revolving credit facility is available for issuance of letters of credit, and up to $5.0 million of the revolving facility is available for swingline loans. The revolving credit facility is secured by SDTS’s T&D assets, the leases, certain accounts and TDC’s equity interests in SDTS on the same basis as SDTS’s various senior secured note obligations described below in Note 7, Long-Term Debt.

The interest rate for the revolving credit facility is based, at SDTS’s option, at a rate equal to either (1) a base rate, determined as the greatest of (a) the administrative agent’s prime rate, (b) the federal funds effective rate plus ½ of 1% and (c) LIBOR plus 1.00% per annum, plus a margin of either 0.75% or 1.00% per annum, depending on the total debt to capitalization ratio of SDTS on a consolidated basis or (2) LIBOR plus a margin of either 1.75% or 2.00% per annum, depending on the total debt to capitalization ratio of SDTS on a consolidated basis. SDTS is also required to pay a commitment fee and other customary fees under its revolving credit facility. SDTS is entitled to prepay amounts outstanding under the revolving credit facility with no prepayment penalty.

At March 31, 2016, SDTS had no borrowings or letters of credit outstanding and $250.0 million of remaining borrowing capacity available under this revolving credit facility. At December 31, 2015, SDTS had $54.0 million of borrowings outstanding at a weighted average interest rate of 2.05% with no letters of credit outstanding and $196.0 million of remaining borrowing capacity under this revolving credit facility. As of March 31, 2016 and December 31, 2015, SDTS was in compliance with all covenants under its credit agreement.

The revolving credit facilities of InfraREIT LP and SDTS are subject to customary events of default. If an event of default occurs under either facility and is continuing, the lenders may accelerate amounts due under such revolving credit facility (except in the case of a bankruptcy event of default, in which case such amounts will automatically become due and payable).