In this task, you are given a summary for US Congressional and California state bill, your task is to generate a Title for this bill. The preferred titles are under forty words and mention the purpose of the bill.

Historic Tax Credit Improvement Act of 2015  This bill amends the Internal Revenue Code, with respect to the tax credit for the rehabilitation of buildings and historic structures, to: (1) allow an increased 30% credit, up to $750,000, for projects with rehabilitation expenditures not exceeding $3.75 million, for which no credit was allowed in either of the 2 prior taxable years (smaller projects); (2) allow the transfer of tax credit amounts for smaller projects; (3) treat a building as substantially rehabilitated if rehabilitation expenditures exceed the greater of 50% of the adjusted basis of the building or $5,000 (currently, the greater of the adjusted basis of the building or $5,000); (4) exempt from tax the proceeds of a state historic tax; and (5) set forth special rules for the tax treatment of tax-exempt use property and functionally-related historic structures. 
Historic Tax Credit Improvement Act of 2015

Amends Federal transportation law to require foreign air carriers to transmit to the Secretary of Transportation and the Chairman of the National Transportation Safety Board a plan for addressing the needs of families of passengers involved in aircraft accidents involving foreign air carriers and a significant loss of life. 
Requires such a plan to include:  (1) publicizing a reliable, toll-free telephone number and staff to take calls from families of passengers involved in such an accident; (2) a process for notifying such families as soon as possible, and in person to the extent practicable, before providing any public notice of the passengers' names; (3) an assurance that each passenger's family will be consulted about the disposition of any remains and personal effects (including return to the family) within the foreign air carrier's control; (4) an assurance of retention by the foreign air carrier of unclaimed possessions for at least 18 months; and (5) an assurance of other specified services. 
Makes inclusion of such a plan in the application for a foreign air transportation permit, or request for exemption from the requirement of a permit, a condition for approval. 
Declares that a foreign air carrier shall not be liable for damages in any action brought in a Federal or State court arising out of the foreign air carrier's performance in preparing or providing a passenger list pursuant to such a plan, unless the liability was caused by any conduct of the carrier which was grossly negligent or which constituted intentional misconduct.
To amend title 49, United States Code, to require the National Transportation Safety Board and individual foreign air carriers to address the needs of families of passengers involved in aircraft accidents involving foreign air carriers.

Medicare Payment Improvement Act of 2009 - Amends title XVIII (Medicare) of the Social Security Act to require the Secretary of Health and Human Services (HHS) to determine a value index for the physician work component for each Medicare physician fee schedule area.

To amend title XVIII of the Social Security Act to create a value indexing mechanism for the physician work component of the Medicare physician fee schedule.